Cincinnati Bengals running back Cedric Benson turned himself into police today -- after being accused of socking a bouncer in the face at an Austin, Texas bar back in May. According to the police report, obtained by TMZ, Benson got into a fight with an unknown subject at Annie's West bar at 1:50 AM on May 30. Cops say Benson was spitting blood from his injured lip.The report continues ... bar employees tried to calm Benson down -- and the NFL star replied, "I don't give a f*ck."Benson was asked to leave the bar ... but refused ... and had to be physically escorted out by security. Once outside, Benson allegedly told a bystander, "All these white boys are ganging up on me and kicking me out." But according to the report, one bouncer heard Benson make the statement and replied, "I'm going to take time out of my busy job to kick you out?"Benson then allegedly punched the bouncer in the face ... and knocked the bouncer back. Bystanders separated the men -- and cops arrived shortly after. Benson was charged with assault with injury. Bond was set at $5,000.