An investigation is under way after a 17 year-old Longview boy was found dead late yesterday afternoon. Longview Police were called to a home in the 200 block of 20th Avenue at about 5:30 yesterday afternoon, where the teen was found deceased. There’s been no details released as of yet regarding a possible cause of death. It’s reported that the teen went to Mark Morris High School, and was also involved in mixed martial arts. No names have been released at this time, as full notifications to next of kin haven’t been completed. An update on the case should be out later today.