They were checking to make sure his bolt was really MP as the chart said it was.
:sarcastic:
Bailiff! Remove that stupid yellow visor!
Somewhere in another forum Rob just posted “Maybe Markm showed up to lecture the guy on how his set up was all wrong… one thing led to another, and boom. ND.”
Brute hateful savages, all of you.
Keep it about the event, and the cop. No need for board drama.
Wait…doesn’t everyone demonstrate an AR15 in a courthouse hallway?? 
On a serious note, this is a great sobering lesson for all us. I know I get rather animated when I am showing a person who knows nothing/little about a particular firearm how it works, good reminder to SLOW down and be DOUBLY safe.