Michael Herbert Singh (born Rupert Sookman; February 25, 1945 – March 30, 2005) was a Trinidad and Tobago-born American serial killer who killed a girlfriend and two wives in New Mexico and Missouri from 1975 to 1982. Found not guilty by reason of insanity for the final murder, he was detained at a mental health clinic until 2005, when he was stabbed to death by a fellow inmate.
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