İmamoğlu on Trial: Anatomy of a 407-Defendant Mega-Case

In March 2025, the elected Mayor of Istanbul and Türkiye’s leading opposition figure was detained, then jailed. One year later, his case opened as a single trial involving 407 defendants. As of today, Ekrem İmamoğlu has not been convicted of anything in this case, and the proceedings remain still ongoing.

This article explains what the case actually involves, how it grew to this scale, what the reported sentence figures do, and do not mean, and why the timing of the proceedings matters as much as the charges themselves.

 

Who Is on Trial, and Why Does It Matter?

Ekrem İmamoğlu is the elected Mayor of Istanbul and one of Türkiye’s most prominent opposition figures. In a country where the mayoralty of Istanbul has historically served as a pathway to national political power, that combination is significant. It is one reason his case draws considerable international attention.

İmamoğlu was detained on March 19, 2025, and jailed on March 23, 2025. The timing is an important part of the story. His jailing came on the same day his party, the Republican People’s Party (CHP), was set to confirm his presidential candidacy. A politician widely regarded as one of the strongest potential challengers to the current government was removed from active political life at the very moment he was poised to emerge formally as a presidential contender.

Human Rights Watch has described İmamoğlu as the leading political opponent of President Erdoğan. That context is essential to understanding the significance of the proceedings against him.

What Is the 407-Defendant Case?

The main trial opened on March 9, 2026, with 407 defendants. That figure alone sets the case apart. While corruption prosecutions may involve networks of officials, businesspeople, and other actors, bringing more than 400 defendants into a single proceeding creates a case of extraordinary scale and complexity.

The indictment reportedly alleges 18 categories of corruption-related offenses involving 142 acts spanning approximately ten years. A decade-long period, 142 separate alleged acts, and numerous categories of offenses have therefore been brought together in one enormous case file.

The scale is not merely a detail. It shapes the nature of the proceedings. When a case is assembled this way, its sheer size can make it exceptionally difficult to summarize, follow, scrutinize, and defend against in real time. Hundreds of defendants, years of alleged conduct, and numerous separate accusations create questions not only about the substance of the allegations but also about whether proceedings of this magnitude can adequately protect each defendant’s right to individualized consideration and an effective defense.

How Long Has He Been Held Without a Conviction?

This is the fact that anchors everything else. As of now, İmamoğlu has been held for roughly 17 months without a conviction in these proceedings.

The chronology is straightforward. He was jailed in March 2025. The main trial did not begin until March 2026. And as of today, no verdict has been reached. He has therefore spent well over a year in detention while the case against him remains unresolved.

Detention before a verdict is meant to serve specific procedural purposes rather than function as punishment before conviction. When pretrial detention extends beyond 17 months for the country’s leading opposition figure, and it began on the very day his party named Imamoglu a presidential candidate, detention inevitably raises serious questions about proportionality, due process, and the political consequences of keeping an elected opposition figure out of public life before any finding of guilt.

What Do the Sentence Figures Actually Mean?

Two extraordinarily large numbers have been associated with this case, and they can easily be confused. Distinguishing between them is essential to accurate reporting.

The first figure is potential sentencing exposure. Human Rights Watch has reported that İmamoğlu could face a cumulative sentence approximately up to 1,929 years if convicted on all relevant counts. It is not a sentence that has been imposed. It represents the potential cumulative exposure associated with the charges.

The second figure concerns the sentence reportedly sought. Prosecutors have been reported as seeking a sentence of up to 2,352 years. This figure comes from the prosecution’s demand, not from any court. It is what one side has asked for. Again, this is not a judicial decision.

Neither figure is a sentence that has been handed down by a court. As of today, there has been no conviction or final verdict in the main case. The roughly 1,929-year figure refers to reported potential sentencing exposure, while the approximately 2,352-year figure refers to what prosecutors have sought. That distinction has to survive every retelling of this case, because collapsing potential exposure, a prosecutorial demand, and an actual sentence into a single number would turn a possible or requested outcome into a judicial fact that does not yet exist.

Why the Timing Points to a Political Purpose

Consider the sequence of events. A leading opposition figure is detained just as his party is preparing to confirm him as its presidential candidate. The case against him is assembled into a 407-defendant mega-case covering ten years and 142 alleged acts. He remains detained for more than 17 months without a verdict. Prosecutors seek a cumulative sentence measured in thousands of years.

Each element can be described individually in the language of criminal procedure. Taken together, however, an unavoidable question is raised: What political effect does the prosecution have before a court ever reaches a verdict?

Whatever the ultimate judicial outcome, prolonged detention has already removed one of the government’s most prominent political challengers from ordinary political life during a critical period. The extraordinary scale of the prosecution also means that the proceedings themselves may continue to shape his ability to participate in politics long before the courts determine guilt or innocence. The political significance of a prosecution, in other words, does not begin with a verdict. Its consequences can begin with detention.

The Human Cost Behind the Case

Behind the numbers is a person who has spent more than a year in detention without being convicted in these proceedings. That is a cost statistics can obscure. Whatever a court eventually decides, that time already served cannot be returned.

And the cost does not stop with one individual. When the leading opposition figure can be detained on the day he emerges as a presidential candidate, remain behind bars for more than a year without a verdict, and face a prosecutorial demand for a cumulative sentence measured in thousands of years, the message reaches other elected officials, potential candidates and voters. It tells opposition politicians what running can cost. It tells citizens that the choice they are about to be offered can be withdrawn before they ever cast a ballot. A verdict does not have to arrive for that message to be received.

Why This Matters Today

The İmamoğlu case remains active. As of today, the trial is ongoing, he has not been convicted in the main proceedings. Every figure and procedural status discussed here therefore reflects the information available at the time of writing and should be updated as the case develops. That is precisely why the case requires careful, sourced, and precise attention now rather than only after a final judgment.

Advocates of Silenced Turkey documents cases like this because the extraordinary scale of a prosecution can sometimes obscure the fundamental questions underneath it. Accuracy is therefore essential. The distinction between a sentence sought and a sentence imposed, between potential exposure and an actual verdict, between detention and guilt, is not a technicality. These distinctions are fundamental to due process and the presumption of innocence.

Maintaining those distinctions; in public, in reporting, and in plain language; is part of protecting the integrity of the rule of law.