Police are searching for whoever fatally stabbed a livery cab driver in Yonkers Thursday night. Officials say 29-year-old Geraldo Gutierrez was stabbed several times in his chest and stomach on Saw Mill River Road while he was inside his cab.According to officials, he then drove himself to 270 Saw Mill River Rd. near Palmer Road, where he hit a telephone pole.Police say Gutierrez was taken to Jacobi Medical Center in the Bronx, but was not able to survive.Anyone with information on the case is asked to call Yonkers police at 914-377-7900.