Sauce: https://en.wikipedia.org/wiki/Vadym_Troyan

Note: this article was updated on Feb 27, 2022.

But there is no mention of his resignation. Was it edited in order to give the impression that he is CURRENTLY dep. chief of police, or Chief of Police? That would apparently be disinfo. See below.

According to this report, he resigned last year.

https://ukranews.com/en/news/812359-national-police-deputy-head-troyan-resigns

Deputy Head of the National Police Vadym Troyan has submitted his resignation statement. That follows from his declaration submitted before the resignation, Ukrainian News Agency reports. He submitted the declaration on September 28.

Statements by the KHPG (Kharkiv Human Rights Protection Group)

https://khpg.org/en/1415367345

The Azov Battalion, made up of volunteers under Andriy Biletsky and Vadim Troyan, has defended Ukraine since the first days of the fighting in Donbas. In announcing Troyan’s appointment, Interior Minister Arsen Avakov asserted that Troyan had “in conditions of conflict proven his right to the public’s TRUST.”

....

Had this procedure been followed, it is inconceivable that the Interior Minister would have appointed the 35-year-old leading member of ‘Patriot of Ukraine’, an organization classified by authoritative researcher Viacheslav Likhachev as neo-Nazi.