In this case, he was getting his show as it took place.
All the people were fleeing and trying to help friends.
Then when it all thinned out, the “fun” part was over.
He killed himself.
Was this all he wanted, just the thrill of killing and watching the panic?
I honestly don’t know, but I’m not convinced we can rule it out.
From the report... Additionally, several hundred images of child pornography were located on the computer’s hard drive
Apparently he liked to get his thrills in many ways.