According to police, the father was called by his sister, who lives next door, at around 1am on Friday when she heard someone outside her home and believed they were attempting to break in. The popular fifth-grade teacher confronted the person wearing a ski mask, black clothing and holding what appeared to be a knife. As the person lunged at him with the knife, Guilliano fired his gun.
Police later told him after removing the mask that he had killed his adopted son Tyler (pictured above). No charges have yet been filed in the case.