Courtesy of Campbell Clinic and Collierville Police Department. Tennessee cops identified 29-year-old Larry Pickens as the man who allegedly staked out and shot physician Benjamin Mauck dead in an exam room this week—an “unthinkable tragedy” that’s horrified his loved ones and colleagues.Pickens now faces charges of first-degree murder and aggravated assault. He’s accused of waiting inside Mauck’s orthopedics office for hours before eventually barging into an exam room and shooting the beloved d