Educate yourself on PCP: http://www.freerepublic.com/focus/news/818715/posts. As for LSD, I don't think even the feds still claim that it causes violence.
I got a sort of an education on PCP during the four years I lived in Prince Georges County Md. at a time when it was more or less the PCP capital of the western world. PG county cops who worked out in the gym I used told me of seeing ten and twelve year olds who were totally fried with no possibility of ever leading useful lives, who couldn't tell you what their name was or where they lived and never would be able to, and I remember a number of utterly berserk crimes for which PCP always appeared to be the common denominator. The name Stephanie Roper comes to mind more than anything else.
Want to educate yourself on PCP? Do a google search on 'Stephanie Roper' and 'pcp' and check out some of what turns up.
So it was conclusively determined that no other substances were involved, and that the berserkers had no preexisting psychoses?
The name Stephanie Roper comes to mind more than anything else.
You can't draw reliable conclusions from a single data point. Again, that address is http://www.freerepublic.com/focus/news/818715/posts; educate yorself or not as you choose.
Only three hits, all making only passing reference to the Stephanie Roper Foundation.