Massachusetts authorities say an Iraq War veteran who fatally shot his 6-year-old son before taking his own life used a handgun he stole from a friend.

The Boston Globe reports the Norfolk district attorney's office says investigators used the gun's serial number to confirm it had been taken from the home of William Scaccia Jr.'s friend.

Police say the 49-year-old Scaccia shot 6-year-old Anthony Scaccia in a Foxborough home in September before killing himself.

State police reports show William Scaccia's friend said Scaccia had unexpectedly showed up at his home the afternoon before the attack. After he learned about the shooting, he unlocked his gun locker and found the firearm was missing.

Source: Khaleej Times