A 23-year-old Mexican man hacked open his father's head after a row and then ate his brain in the western state of Michigan, justice sources said on Wednesday. They said the suspect took a machete and rained blows on his 62-year-old parent, cracking open his skull after the father failed to calm his son following an argument. The son went on to drink blood from the gaping wound in his father's head before eating the man's brains during the incident in the town of Indaparapeo. Officials have so far been unable to confirm neighbours' accounts that the son had mental problems.