Police question teen, but gunman still thought to be at large, they sayRICHMOND — In an act described by police as callous and cold-natured, a masked gunman shot and killed a convenience store clerk after the victim had already handed over the cash during a robbery in Fort Bend County. Altaf Jafarali Maknojia, 24, of Sugar Land, was shot once in the neck shortly after 11:40 p.m. Wednesday as he stood behind the counter at the Chevron station in the 9400 block of FM 1464 in the northeast part of the county. A 17-year-old has been questioned by police but...