The court records for Lira's current case are public records, available online if you know where to look and can translated the Ukrainian. Governments that want to murder people don't arrest them for espionage, give them plea deals and deport them. Then when they return in violation of the plea deal, don't arrest them, post videos on social media, give them court appearances, release them on bail, catch them when they try to skip bail and leave the country, then prosecute them with ICC lawyers watching to make sure the case is prosecuted fairly.
Ukraine did nothing to kill him for two years when according to Lira, they could have if they wanted to and he was such a big problem for that super villain Zelensky. All the talk of Ukraine wanting to kill Lira, was from Lira.
As to why he returned to Ukraine (when before he returned he was pretending to be there all along), who knows? Lira never said why he went back to Ukraine. He did, that was his choice, and he was responsible for it. No one made him go back.
Get it through your head. Lira lied like a normal person breathes. Any time he told a truth was to provide cover for the lies he was telling.