Growing up, my best friend lived next door, but we had grown apart by junior high. She fell into a rougher crowd and eventually certain mental problems became apparent. It culminated one day in our late teens when my mom and I heard screaming from next door. We heard loud threats and called the police, but the dispatcher informed us that another neighbor was already ahead of us in that matter. It turned out that my ex-best friend snapped and was chasing her parents around the house with a knife. She had to be dragged out into a paddy wagon. And that didn't go well. She screamed the whole way, said the cops were hurting her, begged to get her cigarettes and managed to escape back into the house. It took at least five cops to get her into the wagon. Meanwhile the neighborhood had gathered to watch, upsetting her mother, who started screaming at everyone for gawking. I remember crying and feeling helpless for my old friend through it all. She was taken to a local hospital for psychological treatment for a while. While she had several minor incidents after that, none were as dramatic.
At the same house, I once heard a helicopter hover just above my bedroom window while I was in there reading. When I peeked out to see what was going on, I heard a voice as if it were coming through a megaphone say "Get back in the car, and don't try anything funny." I couldn't see anything, but it seemed as though a police copter above my house was monitoring someone on the street behind my house.
My current neighborhood is relatively quiet, but we've had a few troubling incidents recently. One, a man was found shot dead in a dumpster at the hopital up the street from me. The investigation determined that he crawled in there to commit suicide.
At the local bar where I play trivia once a week, a waitress was abducted and forced to drive up the road into the next city. When she crossed city lines, she knew he was planning to kill her, so she rolled out of the car and escaped with minor injuries. This happened late on trivia night, on a night I skipped going for a reason I now forget. The time she was abducted was the time I'd usually be leaving, by myself, for the walk home.
And in the neighborhood mall, we recently had a teen jump off the top floor of the parking garage in front of all his friends. Lucikly, for him he survived. Yes, drugs were involved.