The arrest comes weeks before he was to surrender to go to federal prison after being convicted of COVID-related fraud.
The troubling video shows the man in the middle of the road with several people surrounding him on bikes, taking turns kicking the car and even blowing out a windshield with a brick.
Bulger, the leader of Boston's Winter Hill gang, was on the run for 16 years before being caught by federal authorities, and later tried and convicted.
Just outside Las Vegas investigators are trying to identify old human remains found in a drying-up lake. There's speculation those remains could be tied to the Chicago mob.
"Is there anything that I feel I regret and that I would do differently? Of course," Gravano told ABC News.
"They have made a mockery of democracy by embracing the fascist rhetoric of a far-right figurehead with a far-right movement," the group said.