Sheriff’s deputies in Audubon County arrested an Atlantic man this (Friday) morning on an outstanding Audubon County warrant for a Sex Offender Registry Violation. 57-year old Mark Anthony Martens was taken into custody at around 11-a.m., following an ongoing investigation into Martens’ place of residence.

Martens was brought to the Audubon County Jail, where he was being held on $2,000 bond. The incident remains under investigation. Atlantic Police and the Cass County Sheriff’s Office assisted in conducting the arrest.