Matthew Barrett Beauchamp RESOLVED Beauchamp, circa 2018 Missing Since 09/29/2018 Missing From Mexico, Missouri Classification Missing Sex Male Race White Age 23 years old Distinguishing Characteristics Caucasian male. Details of Disappearance Beauchamp disappeared from Mexico, Missouri on September 29, 2018. In December 2019, his remains were found in central Missouri, in a rural area west of Mokane. His death is under investigation. Investigating Agency Audrain County Sheriff’s Office 573-473-5801 Source Information Missouri State Highway Patrol Missing & Homeless The Houston Chronicle Updated 2 times since October 12, 2004. Last updated December 23, 2019; case resolved.