4:39 PM PT -- Campbell Police Department Captain Ian White tells TMZ ... police responded to a call Tuesday, but when they got to Marshalls, the guy was gone. We're told a complaint was filed and the investigation is ongoing.
This anti-masker has found his hill to die on ... and it's inside a Marshalls.
Check out this video from the discount department store in Campbell, CA ... the guy is shopping without a face covering, and he throws a fit when employees ask him to leave and launches into a homophobic rant.
The man in the video, who some are calling a male "Karen," or "Kevin," thinks he's smarter than everyone else, but he's not ... you'll hear him claiming it's a $75,000 fine to deny service to people with disabilities. Seems he got his info from the alleged "Freedom to Breathe Agency." Yeah, that's been debunked ... it's not a real thing.