Doctor Ray Mathis is a minor recurring character on Criminal Minds.
Absolutely nothing is known about Mathis, other than he got a job as a coroner in San Diego, California. He has shown members of the BAU the bodies of victims whenever they investigate cases in San Diego.
Mathis shows Hotch and Rossi the bodies of Greg Phinney's first three victims and points out the defensive wounds on their arms. He also confirms Hotch's question that the number of stab wounds increased with each victim, adding that the first victim's stab wounds showed hesitation, with the fatal wounds being directed at the heart. When Rossi asks if the wounds indicated the unsub had medical knowledge, Mathis says the unsub could have gotten lucky. He then says that by the time the unsub claimed his third victim, he had grown confident.
Mathis reunites with Rossi and is introduced to Blake while showing them the bodies of Brenda Wipley and Mark Logan, the victims of Ellen Russell and Darlene Beckett. He asks Rossi if it really took the Los Angeles medical examiner four hours to find Logan's entire body, and Rossi confirms it. Mathis comments that Wipley had it easy, since she was killed by a series of blows to the head and dragged by a car post-mortem instead of ante-mortem.
- Mathis is the second of nine characters in a medical profession to appear more than once in the show's history. The others are:
- Doctor Sherman, who appeared in the Season Six episodes Valhalla and Supply and Demand.
- Doctor Stacey Carroll, who appeared in the Season Seven episode Epilogue, then reappeared in the Season Eight episode The Fallen.
- Doctor Tony Wilson, who appeared in the Season Two episode The Big Game, then reappeared in the Season Ten episode The Itch.
- Doctor Weiss, who appeared in the Season Eight episode The Replicator, then reappeared in the Season Ten episodes Fate, Nelson's Sparrow, and The Hunt.
- Doctor Pat Lewis, who appeared in the Season Nine episode The Inspiration, then reappeared in the Season Eleven episode Awake.
- Doctor Samuel Bayo, who appeared in the Season Six episode Sense Memory, then reappeared in the Season Eleven episode A Badge and a Gun.
- M.E. Cranston, who appeared in the Season Seven episode There's No Place Like Home, then reappeared in the Season Eleven episode The Sandman.
- Doctor Taylor, who appeared in the Season Nine episode The Return, then reappeared in the Season Thirteen episode The Dance of Love.