Catarino Piedra, 41, kept a gun underneath the counter at the Coliseum Pizza and Taqueria that he owned in East Oakland because his drivers had been robbed many times while making deliveries. Allen Joseph Hicks III, 22, was an accused batterer on probation for a drug conviction and an aspiring rap artist whom everybody in his neighborhood knew as "Boonie." The lives of the two men intersected tragically at about 9:30 p.m. Thursday when Hicks, armed with a pistol and joined by two other men, tried to rob Piedra inside the popular pizzeria at 89th Avenue and International Boulevard. Fearful...