A man who disposed of the chainsaw used to dismember the body of Kenneth O'Brien has been found guilty of impeding the prosecution of his father, who carried out the murder and dumped the victim's body parts in the Grand Canal.

The Welshman had been cleared to play in Singapore after having the stitches removed.

A Philadelphia man killed his wife with a chainsaw and then turned the machine on himself in a grisly murder-suicide, prosecutors said.