Maybe the answer to "How come a 17 year old had an AR15" is
When I was in Cub Scouts we would bring our .22s to school to shoot in the basement 50 foot range next to the fallout shelter.Maybe the answer to "How come a 17 year old had an AR15" is
"because sometimes convicted felons carry handguns"....
Equal parts dishonest and just plain dumb.