Complex sentence: In 1980, chief agent John Douglas, working with agents in the FBI's Behavioral Sciences Unit, issued a psychological profile of the unidentified bomber which described the offender as a man with above-average intelligence with connections to academia.
Split into simpler sentences: In 1980, chief agent John Douglas, working with agents in the FBI's Behavioral Sciences Unit, issued a psychological profile of the unidentified bomber. It described the offender as a man with above-average intelligence and connections to academia.