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Tuesday evening, OSBI special agents made a second arrest in the murder of 30-year-old Karlie Pierce. Agents arrested Adam Duane Collier (d.o.b. 9/8/1976) in the 200 block of N. Weigle in Watonga (Blaine County Courthouse) for accessory to first degree murder. During the investigation, agents learned Collier assisted in the cleanup of the crime scene, helped with the removal of Pierce’s body from the crime scene, as well as the disposal of her body and evidence of the crime. The investigation reveals Alan Dale Brower killed Pierce at the home they shared in Watonga on or about January 2, 2017. Pierce’s father found her burned body in his field near Greenfield January 4, 2017. The Blaine County Sheriff’s Office requested OSBI help investigate. January 6, 2017, OSBI special agents and Blaine County deputies arrested Bower for first degree murder.