How mad was 17-year-old Tyler Hadley when his parents refused to let him throw a party at their home in Florida? Police say he murdered them both with a 22-inch hammer, covered their bodies, and then threw the party anyway. Some 40 to 60 people showed up for the party. Police received a noise complaint but did not inspect the house until they received an anonymous tip that Hadley may have killed his parents. Just last week Hadley had visited family with his father in Georgia. "They had a good time," his grandfather Maurice tells ABC News. "They went for walks together, whitewater rafting, went out on a boat..."