Christopher M. Nance, 26, of the 4600 block of Farlin Avenue in St. Louis, was sentenced Friday to 10 years in prison for a convenience store robbery in St. Peters. Nance pleaded guilty in September on one count of robbery. Police said he stole on June 24 $170 in cash and $144 in lottery tickets from a Mobil station at 203 Mid Rivers Mall Drive. His alleged accomplice, Amy K. Doolin, 19, of the first block of St. Luke Drive near St. Peters, also has been charged with robbery. Her case is pending.