03/12/2012 09:01 pm ET Updated Mar 12, 2012

Gabriel Wierzbicki, N.J. Man, Killed Parents Before Killing Himself: Police (VIDEO)

Gabriel Wierzbicki, a 26-year-old man from Kingwood, N.J., apparently killed his parents before killing himself, officials said Monday.

“It appears on the surface that a husband and his wife died at the hands of their son, who then killed himself,” Hunterdon County Prosecutor Anthony P. Kearns, III told the New Jersey Star-Ledger on Tuesday.

Authorities found several firearms inside the house, but wouldn't say whether Gabriel left a suicide note. Kearns said they are still investigating the motive and possible incidents that could have triggered the killings.

Sources said Wierzbicki recently returned home from college and was hoping to look for work. WMFZ reported that he had several run-ins with the law over the years, including past arrests for assaulting a man with a crowbar, shoplifitng, and drunk driving.

A neighbor sued the family in 2000 after a teenaged Gabriel allegedly shot their dog, WMFZ reported.

Neighbor Ken Hayes said he often heard gunshots from the Wierzbicki house, according to

According to Wierzbicki's Facebook page, he studied at Delaware Valley Community College and was an auto mechanic. In addition, he said that the two people who inspire him are his mother and father.