Stevenson was sentenced to four years in prison for managing prostitutes and assault, but was released after 20 months. S tevenson was enraged by the La Presse story, though I have yet to find a press account in which he actually denied the details.
Genetic mutation. PKU is caused by a genetic mutation (change to the DNA) in the human phenylalanine hydroxylase (PAH) gene. There are many different types of mutations that can affect the PAH gene, all of which result in the body not producing a functioning PAH enzyme.
Definition. Phenylketonuria (fen-ul-ke-toe-NU-re-uh), also called PKU, is a rare inherited disorder that causes an amino acid called phenylalanine to build up in your body.