Couple Pleads Not Guilty in Suspected Pimp Killing A San Francisco couple accused of shooting and killing a man they suspected was pimping and beating their 17-year-old daughter has pleaded not guilty. The San Francisco Chronicle reports (http://bit.ly/MAqdyK) that 38-year-old Barry Gilton and his girlfriend, 37-year-old Lupe Mercado, entered the plea Friday. Police say they murdered 22-year-old Calvin Sneed after learning their daughter might be working as a prostitute for him. Sneed was shot in his car on June 4 near the couple's home. Attorneys for the couple say Sneed began beating and pimping the girl after meeting her in Los Angeles six months ago, and the girl refused her parents' pleas to come home. But they say the couple did not kill Sneed.