I don't know any old casualties, but I have a friend that lost his mind for the night from acid when we were 16.
A different friend had a vial of liquid, and it was quite strong, definitely not diluted much. He was selling it and we ended up having an acid party in another friend's basement.
So they guy selling acid dosed buddy early on in the night, but instead of dropping it on your hand and you lick it off, like you're supposed to so you can see how many hits were given, he dropped an entire dropper full of liquid into my friends mouth on his tongue. For the record, this is an insane amount of acid to take. I figure it's around 20-30 hits.
Everything was going fine, we were all starting to trip balls. Shit was getting empty and colourful. Then my friend started saying "oh shit!! What the fuck!!" Things like that.
He ended up running outside and disappearing. We were all like what the fuck, and continued chilling in the basement.
Anyway, my friend apparently went home, and his mom was home, and she called the house we were at (small town, she knows the friend group and the dad) and flipped out on the dad of the house, who was upstairs.
Rumour that night is that he had eaten some of the acid that was put on animal crackers and put in the fridge, by mistake, but I never found out if this was true or not.
He comes down and yells at us, but I figure he found it was pointless because we were all tripping our faces off, and I remember his mustache being orange and melty.
After awhile, apparently our friend decided to leave his house and come back to the party, but someone (I think maybe him mom?) called the cops, so outside we saw cop lights and sirens and dogs barking just near the house.
My buddy apparently was chased down by the police, but they sicced the cop dog on him and he ended up wrestling the dog and bit the dog. This was what was told in court later on, and they were trying to charge him with assault of an officer.
He got a lawyer, probably the only one in town and pleaded temporary insanity. He got off, I think with just maybe some community service.
The rest of that night was fucked. We all thought we all had done too much acid and that we were next to flip out.
Sorry if that story is jumbled. It's from a 20+ year memory.
As far as casualties... My highschool crush/girl who house I was always over at had a step dad who was a acid burnout. He told me stories about doing windowpane acid and had a theory about kites and how they were going to change the world, if he could just get a kite in everyone's hand.
I've done more acid than the average person probably, but these old hippies like him are a trip, and totally fried.