If true, this story is heartbreaking, sorry for your loss. It may be insensitive to suggest this, but there may have been several other factors that contributed to this tragedy, not only LSD. Vilifying the chemical substance isn't the answer here, the same way cars aren't to blame for crashes. Sure, you may not want to take LSD based on your friends experience, but there are several other people in the world who have had positive experiences who will need better convincing.