Rupert Beale

Dr. is a former Chicago police officer who now writes books on profiling, lectures at Quantico and consults on the Anomaly. Daniel Brady refers to him as "the secret master of Xtreme Profiling."

In the DVD extra "Tactics", Victor Celentano mentioned Beale while reminding Stephen Reyes of the high cost of the government's program.

In episode 2x03 "The Sin Eater", Karin Sebarski rattled off a list of authors on criminal profiling she'd read to Nicolette Lau, including "Beale". 

In episode 2x06 "Cuckoo", Hope Mitchell told Stephen Reyes that she's read "whathisname's books. Rupert Beale." 

Appearances
Beale has appeared in the following episodes and DVD extras:
 * Episode 2x06 "Cuckoo"
 * Episode 3x01 The Unicorn Evils.
 * DVD Extra "Standard of Care"

Books
As noted above, Beale has written a number of books. Known titles include:
 * Curious Crimes (publisher not revealed)
 * Murder in the Second City St. Martin's Press, 2001
 * Enigma: A Brief History of Bizarre and Confounding Crimes in 20th Century America St. Martin's Press, 2004
 * Long Haul: Into the Mind of the Traveling Killer St. Martin's Press, 2008

Quotations from several of Beale's books can be found in episode 3x06 "Uniform".