Psychopathy

Psychopathy is associated with Dishinibited Box Wave types, esp. when Introverted, according to  Paulos Recognition, which seeks to find MBTI-like aspects in faces.  "A lack of empathy is common in Disinhibited Box types, and social norm violators tend to be Wave types."

A Box type face will have yang features, and a Wave type will have an oval or round face.

The following are Kinesthesians (in line box wave), and we can assume these criminals were Disinhibited:

• David Koresh Branch Davidian religious sect leader
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• Marshall Applewhite A self-proclaimed prophet and messiah
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• Jesse James An outlaw, gang leader, bank & train robber, murderer

 (out curve box wave) 

• Richard Nixon Politician, Former U.S. President, Disinhibited type

Paulos doesn't list any female psychopath himself, but here are some pics of some to consider:

Stacy Castor, the Black Widow

Is she a Box, with yang features, and Wave, with oval face, I'd say yes.

Dorothea Puente 

Also has yang features with an oval face, Box Wave.

Aileen Wuornos, subject of the movie Monster

also a Box Wave

... but hey, don't listen to me or anyone, EXPRESS YOUR TRUTH! Jane