Sioux Falls, SD (KELO-AM) A "guest of the state" that decided to leave early is back in custody. 20 year old Skyler Culp walked away from the South Dakota State Penitentiary's minimum security unit at the Jamison Annex on Thursday. He was arrested in Des Moines, Iowa overnight. Culp is being held at the Polk County, Iowa jail. At the time of the walk-away, he had been serving a ten year sentence, with eight years suspended, for grand theft out of Yankton County.