WARREN, Mich. - An employee at the General Motors Technical Center in Warren stabbed by someone visiting the plant Wednesday. The 52-year-old victim was hospitalized and suspect arrested by police - but the valet service supervisor with a valid CPL who pulled his gun to stop the attack, says he was fired. Didarul Sarder, SP+ Valet Supervisor was heading into work Wednesday morning at the General motors technical center in Warren, when he heard the cry for help. The lady kept saying 'I'm dying, someone help' and it was just natural reaction," said Didarul Sarder, SP+ Valet Supervisor. "I just...