Challenging Detention Before İzmir Heavy Criminal Courts: Process And Key Considerations

Detention is not a final sentence but a temporary protective measure applied during trial proceedings. Under the Code of Criminal Procedure, two fundamental conditions must coexist for detention:

• Concrete evidence demonstrating the existence of strong suspicion of an offence
• The existence of a ground for detention

The principal grounds for detention prescribed by law are: the suspect's or accused's risk of absconding and the risk of tampering with evidence (destroying, concealing, or altering evidence, or exerting pressure on witnesses, victims, or others). For certain serious offences (catalogue offences), the existence of these grounds may be presumed alongside the strong suspicion requirement.

An important principle is proportionality: Detention must be proportionate to the gravity of the offence and the expected penalty. If judicial supervision measures (such as reporting obligations, travel bans) are deemed sufficient, detention should not be resorted to. This principle constitutes one of the strongest grounds in an objection petition.

The authority issuing a detention decision varies according to the stage of proceedings:

• During the investigation phase: The decision is made by the Criminal Judgeship of Peace upon the request of the public prosecutor. After the suspect's statement is taken as part of the prosecutor's investigation, they are referred to this judgeship with a detention request.
• During the prosecution (trial) phase: The court hearing the case renders the decision. For offences falling within the jurisdiction of heavy criminal courts, this is the İzmir Heavy Criminal Court.

In İzmir, these proceedings are conducted at the Bayraklı campus of the İzmir Courthouse.

An objection is available as a legal remedy against a detention decision. The most critical point here is the deadline:

• The objection must be filed within seven days from the date the decision is learned of or served.
• The objection petition is submitted to the judgeship or court that issued the decision. If this authority considers the objection well-founded, it corrects its decision; if not, it forwards the objection to the superior or next-ranking authority competent to review it.

In practice:

• An objection against a detention decision issued by a Criminal Judgeship of Peace is reviewed by the next-numbered Criminal Judgeship of Peace at the same location.
• An objection against a detention or continuation-of-detention decision issued by the Heavy Criminal Court during the prosecution phase is evaluated by the competent appellate body.

The appellate body conducts its review, as a rule, on the file, and its decision is final.

An effective objection is grounded in concrete legal arguments rather than general statements. The principal issues are:

• Failure to support strong suspicion of an offence with concrete evidence: The suspicion remains abstract; the evidence in the file does not reach the intensity required for detention.
• Absence of a ground for detention: Permanent residence, family and employment ties that dispel the risk of absconding; absence of the risk of tampering with evidence on the grounds that evidence has largely been collected.
• Proportionality and judicial supervision: That judicial supervision measures would be sufficient in the specific case.
• Inadequacy of reasoning: The unlawfulness of detention decisions that are boilerplate, not tailored to the specific case, and lacking reasoning. The Constitutional Court and the European Court of Human Rights have emphasized in their case law that detention decisions must contain individualized and sufficient reasoning.

The objection is not the only avenue:

• Release request: The suspect, accused, or defense counsel may request release at any stage of the proceedings. If the request is denied, that decision may also be objected to.
• Ex officio review: Whether detention shall continue is reviewed by the competent authority at regular intervals (at least every thirty days during the investigation phase) of its own motion. A release request may also be raised during these reviews.

Therefore, even if the objection deadline is missed, the matter may be brought back to the agenda through a release request if the circumstances have changed.

Detention is subject to a maximum duration, which is prescribed by law. For cases falling within the jurisdiction of heavy criminal courts, the maximum detention periods are separately regulated for the investigation and prosecution phases and are subject to specific upper limits, including extensions. For certain categories of offences (e.g., terrorism or organized crime), these periods may differ. Exceeding the time limits constitutes an important ground for release requests and objections; the current limits must be verified on a case-by-case basis.

The typical flow in İzmir operates as follows: following procedures initiated at police stations in Konak and surrounding areas, the suspect is referred to the İzmir Courthouse (Bayraklı) as part of the prosecutor's investigation. If the prosecutor requests detention, the person is brought before the Criminal Judgeship of Peace. If a detention decision is issued, the objection remedy may be pursued within the seven-day period. Once the case proceeds to the prosecution stage, decisions regarding the continuation of detention are evaluated by the İzmir Heavy Criminal Courts. Because these stages proceed swiftly, contacting a criminal defense lawyer in Konak at an early stage is important to ensure the objection deadline is not missed.

When domestic remedies are exhausted, an individual application to the Constitutional Court may be made on the grounds of violation of the right to personal liberty and security. In cases of prolonged or unreasoned detention, an application to the European Court of Human Rights may also be considered when the conditions are met. These applications are subject to their own specific deadlines and conditions.

• Missing the seven-day objection deadline
• Filing the objection without grounding it in concrete evidence and facts, relying instead on general statements
• Failing to address the judicial supervision option and proportionality principle in the petition
• Failing to document factors that weaken the risk of absconding, such as permanent residence, family and employment ties
• Never resorting to the release request avenue when the objection deadline has been missed

Within what period must an objection to detention be filed? The objection must be filed within seven days from the date the decision is learned of or served.

Where is the objection filed? It is submitted to the judgeship or court that issued the decision; if this authority does not consider the objection well-founded, it forwards it to the superior or next-ranking authority competent to review it.

What happens if the objection deadline is missed? Even if the deadline is missed, a release request may be made at any stage if circumstances have changed; detention is also reviewed ex officio at regular intervals.

Can judicial supervision be applied instead of detention? Yes. If judicial supervision measures are deemed sufficient, detention should not be resorted to; this is one of the principal grounds for objection.

Is there another avenue if the objection is denied? When domestic remedies are exhausted, an individual application to the Constitutional Court and, when conditions are met, an application to the European Court of Human Rights may be considered.

Where are detention proceedings conducted in İzmir? Prosecutor's investigation and judgeship/court proceedings are conducted at the Bayraklı campus of the İzmir Courthouse; during the prosecution phase, the İzmir Heavy Criminal Courts have jurisdiction.

Challenging detention is one of the most critical and time-sensitive stages in the protection of personal liberty. Not missing the seven-day deadline, grounding the objection in concrete evidence and facts, and effectively invoking the proportionality principle are determinative for the proper conduct of the process. Even if the deadline is missed, the avenues of release request and ex officio review remain open.

For legal assistance regarding detention, objection, and release processes, please contact Yücesoy Attorney Partnership & Law Office.

Av. Mehmet Yücesoy

İzmir Attorney & Legal Consultancy