I found out the night it happened, from a friend who was working at KI that night. I recall him being a character actor. I don't know if he was working or on break, but he was by the Eiffel Tower when it happened.
The operator of the elevator said there was a thump. then blood started running down the outside of the box.
I don't want to say his name, but the character actor saw the elevator himself. He was close enough when it came down to see it.
He was shaking when he talked about it. I was at his girlfriend's house at the time, (she was my cousin,) when he came over to talk about it. He was let off of work early.
My aunt got him some of her best scotch, and he told us about what he saw and heard.
From what the police could tell, John Harter was climbing on the inside of the tower to the top. There was no room for both him and the counterweight where he was climbing. As he was climbing up, the counterweight came down, smashing him full on, and that's when he fell onto the top of the elevator. It evidently wasn't a simple decapitation, because they had a large area taped off to look for body parts.
Edit:
I called my cousin and double checked the story. The counter weight was going up, caught him, and dragged him through the rollers at the top of the tower. I had my direction wrong.
+1
As for TJ still hanging around the park that is open for your own interpretation. If anyone else can explain why a paint can of nails happend to fly 6' and turn on the lights on the storage run on Beast.....