Kevin Duane Marshall, 38, was last seen by his mother on May 19, 2016, at her home in Eagle Butte on the Cheyenne River Sioux Reservation. He was expected to travel to Rapid City to attend his eldest daughter’s high school graduation on May 21 but never arrived and has not been seen or heard from since. His absence from that family event was described as uncharacteristic despite a strained relationship with the daughter related to his struggles with addiction.

Marshall is Native American, with black hair and brown eyes, about 5 feet 10 inches to 5 feet 11 inches tall and 165 to 190 pounds. Distinguishing marks include tattoos: Jewett on his right forearm; CH and a skull with a joker hat on his left arm; KDM on his left forearm; a medicine wheel on the right side of his neck partially covered by a larger design; a one-and-a-half-inch scar on the top left of his head; a circular birthmark on his left elbow; and he may have had a plate or pin in his chin from a prior jaw injury.

The Cheyenne River Sioux Tribal Police are handling the investigation. Family members have conducted their own searches and say they feel the official investigation has lacked progress; rumors and unsubstantiated leads have compounded their distress. The case remains classified as an endangered missing person. Does anyone in Eagle Butte or Rapid City remember seeing Kevin around May 19–21, 2016, or have information that could help his family?