SIOUX FALLS, S.D. (KELO) -- A Box Elder man arrested in an undercover sting admits sending nude pictures to someone he believed to be a 14-year-old girl. Authorities arrested Vance Coats during this year's Sturgis Motorcycle rally. According to court documents, Coats plans to plead guilty to attempted receipt of child pornography. Crash on I-90 leaves 1 dead, another seriously injured When he's sentenced, Coats faces a minimum of five years in federal prison. Under the plea agreement, he'll also be required to register as a sex offender.