He may be behind bars for stalking Madonna, but that isn't stopping Robert D. Hoskins, 42, from continuing his obsession with the Material Mom. After climbing a wall to enter Madonna's Los Angeles estate in April 1995 (and being stopped by one of her bodyguards, who shot him), Hoskins was convicted on charges of stalking, making violent threats and assault. Though he is set for release in 2004, "We're going to try to keep him in custody," Los Angeles County Deputy District Attorney Rhonda Saunders told the Associated Press. Hoskins revealed his ongoing fixation with the pop star during a prison interview with a psychologist and in letters Hoskins wrote to his family. Madonna spokesperson Liz Rosenberg said the Madonna would not comment on Hoskins.