NEW FAIRFIELD, Conn. – A small Connecticut town was sent reeling in grief and confusion Friday after a popular fifth-grade teacher shot and killed a knife-wielding prowler in a black ski mask, only to discover it was his 15-year-old son.

No immediate charges were brought against the father, Jeffrey Giuliano, in the slaying of his son, Tyler, who was gunned down in his aunt’s driveway next door to his own home about 1 a.m. Thursday.

“It’s something out of a Hollywood script,” said John Hodge, the first selectman, or top elected official, in the town of nearly 14,000 people about 50 miles from New York city. He said he couldn’t recall another killing in his eight years on the job.