his home with multiple gunshot wounds. all units operating, 15 willow brook road, colts neck. evacuate the building. reporter: inside, the bodies of his wife jennifer and who they believe to be their two children. a source telling abc news investigators suspect all three were stabbed. unfortunately, sadly, each of these individuals were the victims of homicidal violence at some point prior to when the fire was set. reporter: it turns out, earlier in the day, ten miles away, the home of the victim s brother was also burning. today, police charging that brother, paul caneiro, with aggravated arson of his own home, saying he doused it with gasoline, then set it on fire while his wife and two daughters were inside. no one was injured. police say the two fires are related, but they have not called caneiro a suspect in the death of his brother and family. the two brothers ran a tech company together. the victim, keith caneiro, was the ceo. and gio benitez joins us live
and then tomorrow morning, when we dry out, you also are chilled to your bone. it will feel like 6 at the macy s parade. 0 for meriden, connecticut. 9 below, burlington, vermont, which could go for their coldest thanksgiving on record. so, too, could providence. so, you know the headline here is cold. but it is sunshine and decent weather, really, back to the west. 60 for denver and kansas city. pockets of rain that could help the smoke in the west. tom? all right, ginger zee for us tonight. ginger, thank you. now to tonight s other headlines. chilling new details in the mansion deaths in new jersey. prosecutors revealing how a father, mother and their two children were killed, their house then set on fire. the father s brother now under arrest, and accused of torching his own home. here s abc s gio benitez. reporter: tonight, authorities in new jersey say a nightmare unfolded inside this burning mansion. the killing of an entire family followed by arson. this is one of most he