Heck yeah! If I lived there I’d buy him a CO2 powered repeater so he could get more shots off next time!
Heh, in the words of a famous politician - you betcha!
A CO2 powered rifle could kill the intruder. FACT.
Some of them cost lots of bucks and have a velocity like a .22 rifle.
One of those between the eyes and it is over. Not a toy.
Cudos for the 10 year old.