Upstate NY madman left chilling suicide note before luring firefighters to death; cops say another body found

William H. Spengler Jr. A homicidal maniac — bent to “do what I like doing best: killing people” — left a chilling suicide note before torching his neighborhood and murdering two firefighters, police revealed this morning. Cops also today said they’ve found a third victim of ex-con William Spengler…