My condolences to the family of the fataly injured worker, and hope the other worker will recover.
I sure would be interested to know how this happened. I can't say for sure, but that looks like a JLG 1250AJP, 125' reach, articulated boom. And, looking at the pics, it fell over backwards, which is the least likely direction a manlift would tip over if it were on firm/level surface and in proper working order. I hope someone catches the follow up report on what happened.
Here's another pic I found on the web.