MEMPHIS, TENNESSEE — Authorities are actively searching for 17-year-old Mario Donyale Lester Jr., who is wanted in connection with the fatal shooting of 18-year-old Mackenzie Kaleb Thomas in Tunica County, Mississippi. The incident occurred on Sunday, April 13, 2025, at approximately 11:13 p.m. at the intersection of Carole Street and Edwards Avenue. The Tunica County…