double murder in AZ

an eight year old boy shot and killed his father and the fathers friend on nov. 5. the boy, whose name has not been released, shot his father and friend twice with a 22 caliber rifle. the boy said after he shot his father the first time he shot him again so he wouldnt suffer. though not mentioned i assume this was the same for the friend. the fathers name is vincent romero, 29, and the friends name is timothy romans, 39, of san carlos. the police are still trying to figure out a motive as to why this as happened. there appears to be no kind of physical abuse to the boy but the police think he may have witnessed abuse in the house at some time. the boy just recieved his 22 caliber as a birthday present which is under debate as well. should the eight year old boy have been given a rifle in the first place? the dad comes from a history of hunters and was trying to teach the boy to follow in his footsteps. also he wanted to teach the boy not be affraid of guns as well. the boy's step mother, tiffany, suggested that he should at least start with a BB gun. the very rev. john paul sauter said "He was just too young. ... That child, I don't think he knows what he did, and it was brutal" (cnn.com). the boy now faces two counts of premediatated murder. there is a video out now of a shady confession by the boy. i say shady because for one its not a full confession it just sounds like one and two there was no legal representation or adult present at the time of the questioning.