Yes. The show 'Mindhunter' is based on real - life events and the work of FBI agents in the Behavioral Science Unit. If Brian is a character within that context, his story would be rooted in the real investigations, interviews with serial killers, and the overall development of psychological profiling that actually took place. For example, the agents in real life really did interview notorious killers like Ed Kemper to gain insights into their minds, and the show, including any character like Brian, reflects that real - world basis.
One of the most interesting cases is that of Edmund Kemper. His story is chilling as he had a complex relationship with his mother which seemed to play a role in his serial killing spree. He was intelligent and his actions were extremely brutal.