Police said Thursday American actor George Rose was clubbed to death by his 18-year-old adopted son and three other men this month and that cocaine was found on his body.

Police spokesman Col. Aquiles Pimentel Cruz said at a news conference that the four were charged with murder in the 68-year-old Rose's death. He presented three of them to reporters and said the fourth had not been arrested.

Pimentel Cruz did not say how much of the drug was found on Rose's body.