A Milwaukee-area teenager will serve 20 years in prison for seriously injuring a woman while trying to steal her purse.  Corleon Thomas was arrested three weeks after the attack last July.  He had used brass knuckles to attack the victim.  She suffered a broken jaw, several broken teeth, cuts to her gums and a severe eye injury.  Thomas and a female accomplice ran away after the victim defended herself using pepper spray.  He told police he wasn’t going to use the brass knuckles, but the woman hit him first.