I am sure we will never know.
At the opposite end of the scale is a friend of mine who shooed me away for like two 13-year-olds - AT THE MALL. I told him, hey, don’t be so freaked.
OTOH, I posted a story a couple years ago about 2 about that age - one or both of them stabbed a woman to death and then went for a drive in her car. With her body propped up in the front passenger seat.
One story said “they’re good kids”. Well, they’re good at stabbing and moving a dead body inside a car; that’s for sure.