A Mississippi man has pleaded guilty to accessory after the fact to capital murder of Biloxi police officer Robert McKeithen.

According to WLOX-TV, the man—identified as 18-year-old Andre Anderson Sullivan—is accused of helping Darian Atkinson hide from law enforcement following the murder of officer McKeithen in May.

Four other individuals are charged with helping Atkinson—Wanya Atkinson, Davian Atkinson, Joshua Michael Kovach, and Dalentez Latavian Brice.