Suspected killer's Facebook post: "I won"

Keith and Christina Belajonas

CBS New York

NEW YORK - Authorities say the man suspected of killing his wife and abducting their two small children from a Philadelphia-area home killed himself on Staten Island as police were closing in on him, reports CBS New York.

According to police, 32-year-old Keith Belajonas fatally shot and stabbed his wife Christina, 28, around 3 a.m. Thursday at their apartment outside Philadelphia.

Superintendent Michael Chitwood of the Upper Darby Police Department in Pennsylvania said Belajonas may have committed the killing in a jealous rage, the station reports. Police said he posted a chilling message on Facebook Thursday morning. "Words similar to, 'We had an argument. She was cheating on me, but I won," Chitwood said.

After the incident, Belajonas fled 100 miles north with the couple's two boys - Christopher, 5, and Robert, 4 - prompting an Amber Alert.

CBS New York reports the suspect made his way to Staten Island, where investigators said he held up his brother, who works at a CVS Pharmacy. Belajonas reportedly had a gun but did not threaten anyone in the store with it. Police said he took cigarettes, money and beer, then left his children behind and fled the scene.

After authorities were alerted to the location of Belajonas' Nissan Pathfinder in Eltingville on Staten Island, officers tracked the vehicle and forced the suspect into a dead end. The station reports police were at the end of the block where the vehicle was located when they heard a gunshot. Officers then swarmed the SUV and found Belajonas dead of an apparently self-inflicted gunshot wound to the head.

Police said the family had been struggling. Last week, Christina Belajonas was fired from her job at a nursing center, according to the station, and the family's home was in shambles.

"Cat urine everywhere," Chitwood said. "I don't know where the two little kids slept, I really don't. [It] was a really, really nasty place."

CBS New York reports the boys were taken to Richmond University Medical Center for observation and officials are looking to turn them over to a close relative.

"Apparently, the older of the two is telling everyone 'Daddy killed Mommy,' so it's obviously traumatic," said Chitwood.