Max Ryan

Max Ryan appears in Unfinished Business.

History
Max Ryan was the profiler and one of the many people chasing Walter Kern, the Keystone Killer, who stopped killing in the end of the 80s. He is apparently famous for catching a serial killer called "The Boise Child Killer". Sometime during Gideon's training, Max became his mentor. When retiring, Max moved to Philadelphia, where the Keystone Killer was active. Sometime after retiring, Max wrote the book Houses of Horrors: The Hunt for the Keystone Killer, which was released in 2006. He had apparently written at least one more book before that. When lecturing about it at the J. Miller Bookstore, he received another letter from the Keystone Killer, who now was back on the hunt. Still bitter over not being able to catch him in the 80s, Max became a temporary consultant for the BAU. Despite having some initial problems working with other people, he was eventually able to catch Kern as he was about to kill another victim and was allowed to make the arrest.

Appearance

 * Season 1
 * Episode 15: Unfinished Business