The 41-year-old electrician called a relative to confess to shooting his wife and two children; he had killed himself by the time police arrived at the scene.
Krzysztof Nieroda, 41, is believed to have shot his wife and their two teenage children at their home in Linden, New Jersey, before shooting himself early Sunday, police said.
Police in Linden, New Jersey, said two adults and a juvenile were killed in a shooting Sunday morning, and that the gunman is believed to be among those found dead.