In the S01E02 Gideon relates how he confronted a killer who stutters saying he knew the cause but he refuses to tell the cause to the rest of the team because they should find it out for themselves.

I didn't watch the whole episode and could not find the answer on internet.

  • 1
    Real life backstory: After examining a series of killings near San Francisco area hiking trails in 1979, FBI psychological profiler John Douglas concluded that the Trailside Killer [David Carpenter] was a stutterer. May 16, 2014 at 15:32
  • @Darrick Herwehe - that is a bit different than figuring the "cause" of a stutter. In the case you cited Douglas deduced that the killer might have a speech impediment based on the criminal behavior (attacked victims from behind, indicating that he lacked the confidence to interact face to face), not what might have caused a stutter. Jul 29, 2016 at 14:54

3 Answers 3



Elle figures it out at the end. Gideon does not know at all; he just told the killer that to buy himself time. Then he gets inside the killer's head, rattles him and gets the upper hand.

Quote from Gideon to Elle:

"I'll tell you what I do know about a stutter: I know how to provoke one."


He stuttered because of embarrassment. Notice how he didn't stutter until Gideon humiliated him by making fun of his math skills.


He stuttered because he was afraid. He only stuttered two times. The first was when he discovered that he was found out by a police or such (Gideon's gun). the second time was when Gideon caused him to get angry.

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