Someone did say, I think it was DMAM, that there were people there waiting for his arrival...so maybe they "helped" him out.
Jorelys' mom is happy with the outcome.
http://www.ajc.com/news/77-year-olds-killer-1308952.html
"This is the kind of justice that I was expecting for him for all the damage that he made to my little daughter," said the victim's mother, Jocelyn Rivera. "Now I can say that I feel satisfied.”
I think that quote is reference to his sentencing, not to him killing himself. I saw a similar quote yesterday, iirc
Eta: never mind, just saw other article which is more clear