State Trooper Matt Losh emerges from the backyard of a home
A US man mistakenly shot dead his 15-year-old son while investigating what appeared to be an attempted burglary next door, police say.
Jeffrey Giuliano, from New Fairfield in Connecticut, opened fire on a masked teenager outside his sister's house, reports the BBC.
Police later told him he had killed his son Tyler. No charges have yet been filed in the case.
"All in all it's a tragedy," said state police spokesman Lt. J. Paul Vance, quoted by the AP news agency.
According to police, the father was called by his sister, who lives next door, at around 01:00 (19:00 GMT) when she heard someone outside the house and believed they were attempting to break in.
Giuliano confronted a person wearing a black ski mask and black clothing, and fired his gun when the person lunged at him with "a shiny weapon".
The teenager was discovered by police lying in the driveway with gunshot injuries, his father sitting nearby. Tyler was pronounced dead at the scene.