FTA:

According to the FBI affidavit, the HSI agents walked up to the Jeep, displayed their badges, identified themselves as law enforcement officers and told Bamigboye that they wanted to talk about his immigration status.

Bamigboye then allegedly jumped into the Jeep’s back seat and yelled at Frazier to drive away.

One of the HSI agents got into the front seat of the Jeep in an effort to stop Frazier while Bamigboye tried to push him out and a second agent tried to pull Bamigboye out of the back seat.

Frazier allegedly put the vehicle in gear and drove off. The HSI agent “was now being involuntarily carried in the Jeep as it drove,” according to the FBI.

The HSI agent tried to put the Jeep in park, but Frazier continually pushed his hand away, allegedly threatened to crash the car and said that they were taking him to a police station.

I'm pretty sure he was not detained. And, I'm pretty sure that just overstaying staying a visa is not actually a crime. I'm pretty sure that entering their car without a warrant for arrest like that is a crime, and gives a reasonable person fear of imminent bodily harm or death.

There's at least cause for a citizens arrest at that point, and while you're not supposed to remove the person you're citizens arresting from the area... driving off to a police station is perhaps the most logically "okay" exception to that.

whatever comes out of this in the courts is going to be fucking metal, though.