Updated

A Connecticut man who fatally shot a knife-wielding prowler in a ski mask and then learned it was his 15-year-old son will not face prosecution.

A person briefed on the decision told The Associated Press on Friday that prosecutors do not plan to file charges against Jeffrey Giuliano. The person spoke on condition of anonymity because investigators have not released their findings.

State police have said Giuliano went outside with a gun around 1 a.m. on Sept. 27, 2012, when his sister called to say someone was trying to break into her house next door in New Fairfield. Authorities say Giuliano saw a masked person holding a knife come toward him in a threatening manner and shot him.

He later was told the person was his son Tyler.