His death served as the "glue" that bonded the team together for the final stretch of the series. Common Misconceptions
They needed to build a passage through a massive water main .
Brad Bellick was not killed by another person; he and drowned during a mission in Season 4. The Death of Brad Bellick
Few characters in Prison Break had as dramatic a transformation as FBI Agent turned inmate Brad Bellick. Starting as a sadistic, corrupt guard at Fox River, Bellick became a broken, desperate, and ultimately heroic figure by the show’s fourth season.