According to a release from Grand Rapids Police, Groenhout was last seen at about 12 p.m. Jan. 21 when he left the area of Fulton and Prospect Avenue SE. He was reported missing Jan. 24, and police issued a release with information on his case Thursday.
Groenhout was last seen wearing all black clothing and carrying a black backpack. He is described in a release as 6 feet 1 inch tall and 180 pounds. Police provided a photo of him, but say he has since shaved his head bald and his beard down to a small goatee.
Anyone with information on his whereabouts should call Grand Rapids Police at 616-456-3604 or Silent Observer at 616-774-2345.