Istanbul’s Chief Public Prosecutor has filed a massive indictment against the city’s imprisoned mayor, Ekrem Imamoglu, accusing him of 142 criminal offenses ranging from corruption to organized crime, according to Turkish media reports.

The 3,900-page document names 402 suspects, with Imamoglu listed as the chief defendant. Prosecutor Akın Gurlek’s office detailed charges including organizing a criminal group, 12 counts of bribery, seven counts of money laundering, and seven counts of fraud. The indictment further holds him responsible for various crimes allegedly committed by others, such as tender-rigging and bribery.

If convicted on all counts, the 54-year-old opposition figure could face up to 2,352 years in prison, according to Haberturk television.

Imamoglu, widely viewed as President Recep Tayyip Erdogan’s strongest political rival, was arrested in March along with several city officials accused of forming a criminal network within the Istanbul municipality. He has vehemently denied the accusations, calling them baseless and politically motivated.

His arrest ignited the largest street protests Turkey has seen in over a decade, as thousands demanded his release and denounced what they see as a government campaign to crush dissent.

The new indictment is part of a growing list of legal battles confronting Imamoglu. Just last month, prosecutors filed espionage charges against him related to his campaign operations, accusing him of transferring residents’ personal data to foreign entities — allegations he dismissed as “nonsense.”

He also faces earlier cases alleging “insults” against Turkey’s Supreme Election Council, threats toward Prosecutor Gurlek, and document forgery.

Critics argue that the mounting cases against Imamoglu and other mayors from the opposition Republican People’s Party (CHP) are part of a broader government effort to neutralize its political opponents following their strong performance in last year’s local elections. Several opposition-run municipalities have reportedly been targeted by waves of arrests since.

The government, however, has rejected accusations of political interference, insisting that the judiciary is acting independently to combat corruption and wrongdoing.

A trial date will be announced once the court formally accepts the indictment, marking the next stage in what could become one of the most politically charged trials in Turkey’s modern history.