At that point, Sophin refused to cooperate any further, calmly stating “I don’t want to answer any questions, O.K.? Thanks. Have a good night” as he drove away, at regular speed, from the checkpoint.
The agent is heard yelling “Hey, you’re not free to go!” as Sophin drives away.
Agents drove after Sophin and eventually flagged him down and ordered him out of his vehicle at gunpoint.
Sophin was arrested and taken back to the checkpoint, where his vehicle was searched without a warrant or probable cause.