Here's the Las Vegas Metropolitan Police Department Preliminary Investigation report on the Oct. 1 shooting.

www.scribd.com/document/369536524/Oct-1-Report#download&from_embed
Here’s the L-bracket that confounded Jesus Campos

i.imgur.com/UUJQlnQ.jpg
For some reason, I thought it was a heavy duty bracket drilled into the floor.
 
 
h/t James