Mason Turner

Mason Turner was an incedental character who appeared in the Season Four finale of Criminal Minds.

Background
Mason had a promising career as a physician as a young man. After graduating from medical school, he came home to the family farm where he decided he was going to sell it due to the death of his father. Lucas, his brother, became enraged and pushed him from a loft in the barn, paralyzing him.

Since that day, he has commanded Lucas to steal medical supplies in order to take care of him. He lays in his bed, surrounded by mirrors that allow him to see everything around the house--inside and out. He also has a voice-activated laptop, with which he dictates his odd theories and makes phone calls.

To Hell and Back
Mason is first seen when his brother Lucas brings a young girl to his window to get his approval. Shortly after, the BAU arrives and finds him in bed, helpless. He demands that they leave, and that his home is his business. The teams looks around to see that his home is filled with medical supplies, both mundane and unusual. A bloody table is also found nearby.

After a lengthy discussion, and the discovery of a bin full of nearly one hundred pairs of shoes, Rossi returns to interrogate him. Rossi begins by removing Mason's mirror so that he cannot see what is going on. He tells Rossi that Lucas had pushed him from the loft and that he has been taking care of him. He says that Lucas is helpless without him and that he is inhumanly strong and dangerous.

Rossi discovers that Mason has been instructing Lucas to kidnap victims. He then tells Rossi that there is a photo of Lucas in the other room. Rossi gets the photo and goes outside to relay the info. The local constable is then asked to get a warrant for Mason's laptop. Hotch calls Garcia and asks her to fly in to hack the computer in person, as he does not want to share any info on the phone.

After hacking into Mason's computer, Garcia finds that Mason has been instructing Lucas to kidnap victims in order to extract stem cells. Mason wants to use the stem cells to cure his paralysis.

Meanwhile, William Hightower, the brother of one of Lucas' victims, is listening outside. As Garcia and JJ are getting more info from the laptop, William walks in with an FBI shotgun. He shoots Mason and is arrested.

Appearances

 * Season Four
 * To Hell and Back, part 1
 * To Hell and Back, part 2