A 17-year-old boy from Port St Lucie, Florida, has done something seasoned psychopaths would dread: He bludgeoned his parents with a hammer for apparently not allowing him to hold a party, and went ahead and had the bash with their dead bodies locked up in the bedroom.

Tyler Hadley posted a Facebook invitation to friends for a party at his parents' ranch-style house at night. Apparently the parents objected to this, triggering a clash that ended up with two brutal killings. Police wove together different strains in the tale to conclude that the death of his parents, school teacher mom Mary-Jo and father Blake, took place after the Facebook invitation had been posted.

Between 40 and 60 people had attended the party which went on until the wee hours of the next morning. Some of those who attended the party said Hadley had looked nervous and panicky during the party.

WSVN News reported that a resident of the area said Hadley's parents had refused to let him host the party. Also, WOKV quoted a teenager who attended the party as saying that Hadley killed his parents as they did not allow him to hold the bash.

It emerged that the teenager had issues with parents in the past. The family was being sued for a traffic accident caused by Hadley in which a child was injured.

Hadley had initially told the police that his parents had gone out, but investigators found the dead bodies locked up in the master bedroom. Hadley will be charged with twin homicides as an adult.