Benjamin Leonard "Dex" Poindexter is a United States Army veteran and former FBI agent with an exceptional talent for precision. Having struggled with mental illness his entire life, Poindexter relied on structure and rules to maintain his sanity. Benjamin Poindexter is the product of a broken and dysfunctional home and childhood trauma that shaped him into a violent, unhinged, vengeful, insecure, ruthless, and nearly irredeemable person. He has borderline personality disorder