State police in Connecticut say it will likely be a week before they're done with an investigation into the fatal shooting of a masked teenager by his father.
The teen was shot outside a neighbor's house during what appeared to be an attempted burglary.
Spokesman Lt. J. Paul Vance said Friday that police are trying to determine if the gun used by Jeffrey Giuliano, the father, was registered. Police say 15-year-old Tyler Giuliano was shot at about 1 a.m. Thursday in New Fairfield.
Initial reports say a woman who was alone in the house believed someone was breaking in and called the teen's father, who lives next door. Police say he grabbed a gun and went outside to investigate. They say the father fired his gun when the masked youth went at him with a weapon.
He then discovered it was his son. Vance says investigators do not yet know if the father or police were called first.