Same here. I got busted in Hollywood when I was 14 years old, back in 1973. I was the only juvenile in a group of about 20 people at a birthday party in an apartment building. They had a helicopter circling the building and shining a spotlight on the apartment we were in, then a group of police came through the door and arrested all of us.
They ended up dropping the charges on my case because the police didn't read me my rights before questioning me. I'd told them "I smoke weed and I'm not going to stop." The last question they asked me was "You were read your rights, right?", and I told them "No". A woman officer standing behind them looked at me and grinned and nodded her head up and down a bit. When I went to court a month or so later the prosecutor told I could go home because the case was dismissed.
But, for quite a few years after that every time I heard a helicopter hovering nearby I'd get a panic attack. It wasn't a vicious one, but I sure felt it.