At the moment Vinnik faces money laundering, and if he was the BOSS and in the USA custody will he want to steal on btc-e users money, that's 1000 years and no chance for a plead bargain, he would choose the legalize btc-e and then go not guilty, I not see why you say there servers seized by the police, what warrant and what country???
You can check the very last page in here:
https://www.justice.gov/usao-ndca/press-release/file/984661/downloadApparently some of their servers were located at equinix. Only search warrant is mentioned in there though, not sure if it really implies the actual seizure of equipment.