BOTH Stephen and Richard Mateer, twin brothers who sexually assaulted two boys in Lake Macquarie more than 30 years ago, are now suffering from signs of cognitive deterioration, Newcastle District Court has heard.
The Mateer twins, 71, on Friday afternoon appeared in court via audio visual link from jail to face a sentence hearing after the pair were found to have committed a string of sexual and indecent assaults against two young boys between 1989 and 1993.
