Criminal Defense in Turkey: Complete Legal Guide 2026

Criminal defense in Turkey is governed by a comprehensive legal framework that balances the state's interest in prosecuting crime with the fundamental rights of the accused. The Turkish Criminal Code (Turk Ceza Kanunu, TCK, Law No. 5237) defines criminal offences and their penalties, while the Code of Criminal Procedure (Ceza Muhakemesi Kanunu, CMK, Law No. 5271) establishes the procedural rules that govern investigations, prosecutions, trials, and appeals. Together, these codes provide the foundation for criminal justice in Turkey, complemented by the Turkish Constitution and Turkey's obligations under international human rights instruments, including the European Convention on Human Rights (ECHR).

Understanding the criminal justice system is critical for anyone who is under investigation, has been detained or arrested, or faces criminal charges in Turkey. The system provides significant protections for suspects and defendants, but these protections are meaningful only when they are actually invoked and enforced. The right to legal counsel, the right to remain silent, the presumption of innocence, and the right to a fair trial are all constitutionally guaranteed, but their practical realization depends on the active engagement of a knowledgeable defense attorney.

This guide examines the Turkish criminal justice system comprehensively. We cover the structure of the criminal courts, the stages of criminal proceedings from investigation through trial and appeal, the rights of suspects and defendants at each stage, the rules governing evidence, the sentencing framework, the prison system, and the avenue of application to the European Court of Human Rights. The full text of the Turkish Criminal Code is available at mevzuat.gov.tr, and the Code of Criminal Procedure at mevzuat.gov.tr.

Our firm, located in Kadikoy, Istanbul, provides criminal defense services throughout Turkey. For urgent matters, contact us immediately at +90 531 500 03 76.

Structure of Criminal Courts in Turkey

The Turkish criminal court system consists of several tiers, each with distinct jurisdictional authority. Understanding which court will hear a case is important because it affects the procedural rules, the available penalties, and the appellate options. The court structure is designed to handle the full spectrum of criminal offences, from minor misdemeanors to the most serious felonies.

Criminal Courts of Peace (Sulh Ceza Hakimlikleri) handle investigative measures during the pre-trial phase, including decisions on detention, search warrants, seizure orders, and other coercive measures. These are single-judge courts that do not conduct trials but play a crucial role in protecting the rights of suspects during investigations. Decisions of Criminal Courts of Peace can be challenged through objection (itiraz) to the next higher court.

Criminal Courts of First Instance (Asliye Ceza Mahkemeleri) are single-judge courts that try offences carrying sentences of up to ten years of imprisonment. They handle the majority of criminal cases, including assault, theft, fraud, traffic offences resulting in injury, and various other offences. The presiding judge conducts the trial, evaluates the evidence, and renders the judgment.

Heavy Penal Courts (Agir Ceza Mahkemeleri) are panel courts consisting of three judges (a presiding judge and two members) that try the most serious offences, including murder, aggravated robbery, organized crime, sexual offences against minors, drug trafficking, and offences against the constitutional order. The three-judge panel structure reflects the gravity of these cases and provides additional judicial scrutiny.

Specialized Criminal Courts

In addition to the general criminal courts, Turkey has several specialized courts. Juvenile Courts (Cocuk Mahkemeleri) handle cases involving defendants who were minors at the time of the alleged offence. Intellectual and Industrial Property Criminal Courts handle counterfeiting, trademark infringement, and patent violations. The determination of which court has jurisdiction over a particular case depends on the nature and severity of the charged offence as specified in the relevant criminal statute.

The organization and jurisdiction of courts are regulated by the Law on the Establishment, Duties, and Jurisdiction of First Instance Courts and Regional Courts of Justice (Law No. 5235), and additional information about court structure can be found at the Ministry of Justice website.

The Investigation Phase: Detention and Arrest

The criminal process in Turkey begins with an investigation (sorusturma) conducted by the public prosecutor (cumhuriyet savcisi) with the assistance of law enforcement agencies. The investigation phase encompasses all activities from the first suspicion of criminal activity through the filing of the indictment or the decision not to prosecute. Understanding the rights available during this phase is critical, as the investigation often determines the trajectory of the entire case.

When a person is apprehended by law enforcement, this is termed "detention" (yakalama/gozaltina alma). Detention is a temporary measure that allows law enforcement to conduct initial questioning and evidence gathering. Under the CMK, the maximum duration of police detention is 24 hours for offences committed individually. For collectively committed offences or in cases where the number of suspects is large, the detention period may be extended, but in no event may it exceed four days. During detention, the suspect has the right to remain silent, the right to legal counsel, the right to be informed of the charges, and the right to notify a family member.

If the prosecutor determines that continued deprivation of liberty is necessary, they must request the Criminal Court of Peace to order formal arrest (tutuklama). Arrest is a more serious measure than detention and can only be ordered when there is strong evidence of guilt combined with a ground for arrest -- specifically, the risk of flight, the risk of evidence tampering, or the risk of interference with witnesses. The arrest decision must be made by a judge after hearing the suspect and their lawyer.

Pre-trial arrest (tutukluluk) is subject to maximum duration limits. For offences within the jurisdiction of Criminal Courts of First Instance, the maximum is one year, which may be extended by up to six additional months in complex cases. For offences within the jurisdiction of Heavy Penal Courts, the maximum is two years, extendable by up to three additional years in cases involving serious organized crime or terrorism-related offences. These periods are subject to regular judicial review, and the arrested person or their lawyer may challenge the continuation of arrest at any time through an objection (itiraz) to the court.

Rights During Detention and Arrest

The rights of suspects during detention and arrest are enumerated in the Turkish Constitution (Articles 19 and 20) and detailed in the CMK. These rights include the right to be informed immediately of the reasons for detention or arrest, the right to remain silent and not to incriminate oneself, the right to access legal counsel from the moment of detention (and to have counsel present during all questioning), the right to notify a family member or designated person of the detention, the right to medical examination, the right to communicate with consular officials (for foreign nationals), and the right to challenge the lawfulness of detention before a judge.

The right to counsel is particularly significant. Under the CMK, for certain serious offences carrying sentences of five years or more, the presence of a defense lawyer during questioning is mandatory -- the investigation cannot proceed without one. If the suspect cannot afford a lawyer, the bar association will appoint one at state expense. This mandatory defense provision ensures that suspects in serious cases are never interrogated without legal representation.

Any statements obtained in violation of these rights -- particularly confessions obtained without counsel or through coercion -- are inadmissible as evidence under Article 148 of the CMK. This exclusionary rule serves as a powerful safeguard against abusive investigative practices.

Rights of the Defense in Criminal Proceedings

The defense has a comprehensive set of rights throughout the criminal process, from the investigation phase through trial and appeal. These rights are designed to ensure a fair balance between the prosecuting authority and the accused, and they reflect Turkey's commitments under both its constitution and international human rights law.

The presumption of innocence (masumiyet karinesi) is a fundamental principle of Turkish criminal law, enshrined in Article 38 of the Constitution. Every person charged with a criminal offence is presumed innocent until proven guilty by a final court judgment. The burden of proof rests entirely on the prosecution, and the accused is under no obligation to prove their innocence. Any reasonable doubt must be resolved in favor of the accused (in dubio pro reo).

The right to a fair trial (adil yargilanma hakki) encompasses several specific guarantees: the right to be tried within a reasonable time, the right to a public hearing, the right to an impartial and independent tribunal, the right to examine witnesses and to present one's own witnesses, the right to access and challenge the prosecution's evidence, and the right to have the final word before judgment. These guarantees are enshrined in Article 36 of the Constitution and Article 6 of the European Convention on Human Rights.

The defense lawyer's role in Turkish criminal proceedings extends beyond courtroom advocacy. The lawyer has the right to access the case file (dosya inceleme hakki) during both the investigation and trial phases (subject to certain restrictions during the investigation to protect the integrity of ongoing inquiries), the right to communicate privately with the client, the right to be present during all procedural steps that affect the client's rights, and the right to submit motions, objections, and evidence on behalf of the client.

Mandatory Defense and Legal Aid

Turkish law requires mandatory defense representation (zorunlu mudalifik) in several categories of cases: when the accused is a minor, when the accused is deaf or mute, when the charged offence carries a minimum sentence of five years or more, and during certain critical investigative steps. In these cases, if the accused does not have a privately retained lawyer, the court or the prosecutor must request the bar association to appoint one.

For accused persons who cannot afford legal representation outside the mandatory defense categories, Turkey provides a legal aid system (adli yardim) through the bar associations. Qualifying individuals can apply to their local bar association for the appointment of a lawyer at state expense. The legal aid lawyer provides the same standard of representation as a privately retained attorney.

The Criminal Trial Process

The criminal trial (kovusturma) begins when the public prosecutor files an indictment (iddianame) with the competent criminal court. The indictment must identify the accused, describe the charged offence with specificity, set out the evidence relied upon, cite the applicable criminal statute, and propose a sentence. The court conducts a preliminary examination of the indictment and may accept it, return it to the prosecutor for correction, or reject it if it is procedurally deficient.

Once the indictment is accepted, the court schedules the first hearing and notifies the parties. The accused receives a copy of the indictment and is informed of their right to submit a written defense. The trial proceeds through a series of hearings at which evidence is presented, witnesses are examined, expert reports are discussed, and the parties make their arguments. The trial culminates in the accused's final statement (son soz) and the court's judgment.

Turkish criminal trials operate under the principle of oral proceedings (sozluluk) and the principle of immediacy (dogrudan dogruyaluk). Evidence must be presented and debated orally in open court, and the judges who decide the case must be the same judges who heard the evidence. These principles ensure that the trial is a genuine adversarial process rather than a mere review of the investigative file.

The defendant has the right to attend all hearings and to participate actively in the proceedings. In certain circumstances, the court may conduct hearings in the defendant's absence, but this is limited to situations where the defendant has been properly notified and has chosen not to attend, or where the law specifically permits trial in absentia. The defendant always has the right to the final word (son soz) before the court renders its judgment -- this right is constitutionally protected and its violation constitutes a ground for reversal on appeal.

Evidence Rules in Criminal Trials

The Turkish criminal justice system operates under the principle of free evaluation of evidence (delillerin serbestce degerlendirilmesi). The court may consider any evidence presented by the parties or obtained by the court itself, and the weight given to each piece of evidence is determined by the judge's free conviction based on the totality of the evidence. There is no hierarchy of evidence -- testimony is not inherently more or less valuable than documentary evidence.

However, the freedom to evaluate evidence is constrained by the exclusionary rule. Evidence obtained through unlawful means is inadmissible and cannot be used as the basis for a conviction. This includes confessions obtained through torture, inhuman treatment, or without the presence of counsel (when required), as well as evidence obtained through unauthorized searches, seizures, or wiretaps. The exclusionary rule is codified in Article 217 of the CMK and reinforced by constitutional provisions.

Witness Examination

Witnesses in Turkish criminal trials are examined in open court. The prosecution presents its witnesses first, followed by the defense witnesses. Each witness is first examined by the party that called them, then cross-examined by the opposing party, and may be questioned by the judges. Expert witnesses are subject to the same examination process. Witnesses who fail to appear despite proper notification may be brought by force, and giving false testimony is itself a criminal offence under the TCK.

Certain categories of witnesses enjoy privileges. Close family members of the accused have the right to refuse to testify (yakinlik nedeniyle cekimser kalma hakki). Professionals such as lawyers, doctors, and clergy may invoke professional privilege to refuse disclosure of information obtained in the course of their professional duties. These privileges protect important social relationships and professional confidences.

Sentencing and Penalties Under Turkish Criminal Law

The Turkish Criminal Code provides a structured sentencing framework that guides the court in determining the appropriate penalty for a convicted defendant. Sentences range from judicial fines (adli para cezasi) for minor offences to life imprisonment (aggravated or standard) for the most serious crimes. The sentencing process involves the application of the base penalty prescribed for the offence, followed by adjustments for aggravating and mitigating factors.

The TCK distinguishes between imprisonment (hapis cezasi) and judicial fines (adli para cezasi). Imprisonment ranges from one month to life, with aggravated life imprisonment (agirlasilmis muebbet hapis) reserved for the most serious offences such as premeditated murder with aggravating circumstances. Judicial fines are calculated by multiplying a daily rate by the number of fine days, with the daily rate set according to the defendant's financial situation.

The sentencing court considers both aggravating factors (which increase the sentence) and mitigating factors (which reduce it). Common aggravating factors include the use of weapons, the involvement of multiple perpetrators, the targeting of vulnerable victims, and the commission of the offence against public officials. Mitigating factors include provocation, remorse, voluntary compensation of the victim, and the defendant's personal circumstances such as age, health, and prior good conduct.

Turkish law provides several alternatives to imprisonment for shorter sentences. Sentences of two years or less may be suspended (hapis cezasinin ertelenmesi), meaning the defendant is released under conditions and the sentence is not executed unless the defendant commits a new offence during the suspension period. Short-term imprisonment sentences (one year or less) may be converted to judicial fines or other alternative sanctions such as community service. These alternatives reflect the principle that imprisonment should be a last resort, particularly for less serious offences and first-time offenders.

Deferral of Judgment (HAGB)

The deferral of pronouncement of judgment (hukmu aciklanmasinin geri birakilmasi, HAGB) is a significant mechanism in Turkish criminal law. When the conditions are met -- including a sentence of two years or less, the defendant's consent, and the absence of a prior conviction -- the court may defer the pronouncement of the judgment for a supervision period of five years. If the defendant completes the supervision period without committing a new offence and complying with any conditions imposed, the case is dismissed and no conviction is recorded. HAGB effectively gives the defendant a second chance and avoids the stigma of a criminal record.

However, recent legislative amendments have modified the HAGB mechanism. Defendants should consult with their legal counsel about the current status and applicability of HAGB in their specific case, as the rules are subject to ongoing legislative development.

Appeals in Criminal Cases: Istinaf and Temyiz

The Turkish criminal justice system provides two levels of appellate review: istinaf (appeal to the Regional Court of Justice) and temyiz (appeal to the Court of Cassation). The appellate system ensures that trial court decisions are subject to scrutiny for both factual accuracy and legal correctness, providing essential safeguards against wrongful convictions and procedural errors.

The istinaf appeal is filed within seven days of the pronouncement of the judgment (or within seven days of notification of the reasoned judgment if the defendant was not present). The Regional Court of Justice reviews both the factual and legal aspects of the case. It may affirm, reverse, or modify the trial court's judgment. The regional court may also conduct additional hearings, take new evidence, and hear witnesses if it deems this necessary for a just resolution. The istinaf review typically takes 6 to 18 months.

The temyiz appeal is the second level of appeal, heard by the Court of Cassation (Yargitay). Temyiz review is limited to questions of law -- the Court of Cassation does not re-examine the facts. It reviews whether the law was correctly applied, whether the procedural rules were followed, and whether the reasoning of the lower courts was adequate. If the Court of Cassation finds a legal error, it reverses the decision and remands the case to the lower court for reconsideration.

Not all criminal judgments are eligible for temyiz review. Eligibility depends on the nature of the offence and the severity of the sentence. Sentences below certain thresholds, fines, and certain categories of offences are final at the istinaf stage. The specific rules governing temyiz eligibility are set out in the CMK and are subject to periodic amendment.

Constitutional Court Individual Application

After exhausting ordinary appellate remedies, individuals who believe that their fundamental rights have been violated in criminal proceedings may file an individual application (bireysel basvuru) with the Turkish Constitutional Court (Anayasa Mahkemesi). The application must be filed within 30 days of notification of the final ordinary court decision. The Constitutional Court examines whether the applicant's constitutional rights -- including the right to liberty, the right to a fair trial, and the prohibition of torture -- have been violated. If a violation is found, the court may order a retrial or award compensation.

The Constitutional Court individual application mechanism serves as an important domestic remedy that must be exhausted before applying to the European Court of Human Rights. It has become an increasingly significant avenue for addressing human rights concerns in the Turkish criminal justice system.

The Turkish Prison System

Turkey's prison and detention system is administered by the Directorate General of Prisons and Detention Houses (Ceza ve Tevkifevleri Genel Mudurlugu), an agency under the Ministry of Justice. The system includes several types of facilities: closed prisons (kapali ceza infaz kurumlari) for inmates serving longer sentences for serious offences, open prisons (acik ceza infaz kurumlari) for inmates who meet eligibility criteria based on their conduct and remaining sentence, and detention houses (tutukevleri) for pre-trial detainees who have not yet been convicted.

Prisoners' rights in Turkey are regulated by the Execution of Sentences and Security Measures Act (Law No. 5275). Inmates have the right to humane treatment, adequate food and medical care, religious practice, correspondence, family visits, access to legal counsel, and petition to judicial and administrative authorities. The execution judge (infaz hakimi) oversees the conditions of imprisonment and handles complaints and petitions from inmates.

Conditional release (kosullu saliverme) is available to convicted persons who have served a specified portion of their sentence and who demonstrate good conduct during imprisonment. The proportion of the sentence that must be served before eligibility for conditional release varies: generally two-thirds for most offences, though different fractions apply to certain categories of offences. Conditional release is subject to a supervision period during which the released person must comply with specified conditions.

The probation system (denetimli serbestlik) provides an alternative to full incarceration for eligible inmates. Under certain conditions, inmates who are approaching the end of their sentence may be released to serve the remainder under probation supervision, which may include electronic monitoring, regular reporting to a probation officer, community service, and participation in rehabilitation programs. The probation system aims to facilitate reintegration into society while maintaining public safety.

Applications to the European Court of Human Rights (ECHR)

Turkey is a party to the European Convention on Human Rights and is subject to the jurisdiction of the European Court of Human Rights (ECHR) in Strasbourg. Individuals who believe that their rights under the Convention have been violated by the Turkish state may apply to the ECHR after exhausting all domestic remedies, including the Constitutional Court individual application. The ECHR provides an important international oversight mechanism for the protection of fundamental rights in the Turkish criminal justice system.

The most commonly invoked Convention articles in criminal cases from Turkey include Article 3 (prohibition of torture and inhuman treatment), Article 5 (right to liberty and security), Article 6 (right to a fair trial), Article 7 (no punishment without law), Article 8 (right to respect for private and family life), Article 10 (freedom of expression), and Article 13 (right to an effective remedy). Turkey has historically been one of the countries with the highest number of ECHR applications, and the Court's judgments have had a significant impact on the development of Turkish criminal law and practice.

The application to the ECHR must be filed within four months of the final domestic decision (following the recent amendment to the Convention's time limit, which previously was six months). The application must set out the facts of the case, identify the Convention rights alleged to have been violated, demonstrate that all domestic remedies have been exhausted, and be filed within the time limit. The Court first examines the admissibility of the application and then, if admissible, examines the merits.

If the ECHR finds a violation, it may award just satisfaction (compensation) to the applicant. The judgment may also indicate measures that Turkey should take to prevent similar violations in the future. In cases where the violation stems from a criminal conviction, the applicant may use the ECHR judgment as a ground for requesting a retrial (yargianmanin yenilenmesi) in the Turkish courts under Article 311 of the CMK.

Criminal Proceedings Involving Foreign Nationals

Foreign nationals who are accused of criminal offences in Turkey are entitled to the same procedural rights as Turkish citizens, with certain additional protections designed to address the particular vulnerabilities of foreign defendants. These additional protections include the right to consular notification and communication under the Vienna Convention on Consular Relations, the right to interpretation and translation services, and the right to have documents translated into a language the defendant understands.

Turkish criminal courts have jurisdiction over offences committed on Turkish territory regardless of the nationality of the suspect (territoriality principle). This means that a foreign tourist, resident, or businessperson who commits an offence in Turkey is subject to Turkish criminal law and can be tried in Turkish courts. The TCK also provides for extraterritorial jurisdiction in certain cases, such as offences committed abroad by or against Turkish citizens and offences against Turkey's security interests.

Foreign nationals who are detained or arrested in Turkey should immediately request that their consulate or embassy be notified. Consular officials can provide assistance including contacting family members, recommending legal counsel, monitoring the proceedings, and ensuring that the detained person is treated in accordance with international standards. The right to consular notification is a fundamental protection under international law, and Turkish authorities are obligated to inform foreign detainees of this right.

Language barriers present particular challenges in criminal proceedings involving foreign nationals. The CMK guarantees the right to an interpreter for defendants who do not speak or understand Turkish. The interpreter must be present during all questioning, hearings, and other procedural steps. All essential documents, including the indictment and the judgment, must be translated into a language the defendant understands. The costs of interpretation and translation are borne by the state.

Common Criminal Offences and Their Penalties

The Turkish Criminal Code categorizes offences into several broad categories, including offences against persons (homicide, assault, sexual offences), offences against property (theft, robbery, fraud, damage), offences against public trust (forgery, counterfeiting), offences against public peace (threats, coercion), drug offences, cyber crimes, and offences against the constitutional order. Each category encompasses multiple specific offences with varying penalties.

Assault and bodily harm (kasten yaralama) under Articles 86-88 of the TCK carry sentences ranging from one year to five years, depending on the severity of the injury and the method used. Aggravated assault -- such as assault with a weapon, against a public official, or resulting in permanent disability -- carries significantly higher sentences. Self-defense (mesru mudalfa) is a justification ground that can negate criminal liability entirely.

Theft (hirsizlik) under Articles 141-142 carries a sentence of one to three years for simple theft and three to seven years for aggravated theft (such as burglary, pickpocketing, or theft from a motor vehicle). Robbery (yagma) under Articles 148-149, which involves the use of force or threat to steal, carries five to ten years for simple robbery and ten to fifteen years for aggravated robbery.

Drug offences under Articles 188-192 carry severe penalties. Manufacturing, importing, or trafficking drugs carries sentences of ten to twenty years. Possession for personal use carries a lesser sentence of one to two years, and the court may defer the sentence and order treatment and probation instead of imprisonment. The distinction between trafficking and personal use is critically important and often contested in drug cases.

Frequently Asked Questions About Criminal Defense in Turkey

Criminal matters require swift and decisive action. The earlier you engage experienced legal counsel, the better your chances of protecting your rights and achieving a favorable outcome. For further information, visit our homepage or contact our office directly.