Slaughter attended Tucker High School in Tucker, Georgia where he helped lead the Tigers to the Class AAAA state semifinals before losing to the eventual state champions. His team finished the season with a 13-1 record and ranked No. 2 in the state. He won region six as a senior with a 10-0 record and was member of a defense that allowed only six points per game (best in Class AAAA) and pitched seven shutouts, and was credited with 56 tackles, three interceptions and 11 pass break ups during senior season. He totaled 66 tackles, four interceptions and three forced fumbles as a junior. He also ran track and had personal bests of 10.9 in the 100-meter dash and 49.0 in the 400 meters.