PORT ST. LUCIE, Fla. -- A Florida teenager is accused of killing his parents and then throwing a house party inside their Port St. Lucie home. Police said 17-year-old Tyler Hadley used a hammer to kill Blake Hadley, 54, and Mary-Jo Hadley, 47, on Saturday. Police went to the home at 371 Northeast Grandeur Ave. about 4:20 a.m. Sunday after getting an anonymous tip that a teenager had killed his parents and that their bodies were still in the home. Detectives said Tyler Hadley was nervous when he answered the door. "He said that his parents were out of town,"...