Gonna need you to provide some sources on the 'ties to the Ukrainian government' there mate. I don't think there's any doubt that he spent time in Kyiv and posted videos encouraging people to join the foreign legion and help the fight.
But as far as I'm reading there isn't any indication that he had ties to the government outside of some Russian news outlets blaming Ukraine for the assassination attempt.
Besides, you link to a place that requires log in but were no one wants to be seen anymore because it is run by a I-dont-know-what-to-say and is overrun by russian propaganda.