The HACC closed the criminal proceedings against Odesa mayor Hennadii Trukhanov, who was charged with false declaration in his 2016 asset declaration.

According to the prosecution, Trukhanov submitted declarations for 2015 and 2016 containing false information. In particular, he failed to reflect in the declarations information about the property, income, and corporate rights of a person with whom he was effectively living as a family. This refers to his ex-wife (their marriage lasted from 1985 to 1997), with whom he continued to live and run a shared household after their official divorce.

According to the investigation, the woman's property and income were subject to mandatory declaration, but the official deliberately did not list them. As a result, Trukhanov's 2015 declaration failed to reflect assets worth around UAH 32.48 million, and his 2016 declaration assets worth UAH 18.81 million. This was subsequently confirmed by expert examinations conducted as part of the pretrial investigation.

Trukhanov's actions were classified under Article 366-1(1) of the Criminal Code of Ukraine.

However, following the Constitutional Court of Ukraine's decision declaring Article 366-1 of the Criminal Code unconstitutional, the Odesa mayor's defense filed a motion to close the proceedings. The motion was based on Article 284(1) of the CPC of Ukraine — that is, on the decriminalization of the offense in question. The HACC granted the motion and closed the criminal proceedings.

Trukhanov was also charged with repeat false declaration in his 2017 declaration, but the HACC closed those proceedings as well.

In addition, Trukhanov features in the Kraian plant case concerning the misappropriation of over UAH 92 million in budget funds, and in the case concerning a scheme to embezzle budget funds and land belonging to the Odesa community, together with businessman Volodymyr Halanternyk. Both cases are currently being heard by the HACC.

In 2025, by a decree of the President of Ukraine, Hennadii Trukhanov was stripped of his Ukrainian citizenship. According to the SSU, the official held a valid Russian foreign-travel passport, while his internal Russian passport was cancelled only later. This decision became the grounds for the early termination of his powers as mayor.