David Chavis

David Chavis argues with his attorney in August 2017 before being led out of a courtroom in the Townsend Justice Center in Casper, Wyo.

CASPER — A Wyoming man has been found not guilty by reason of insanity for writing a letter in which he threatened to kill a federal judge in December 2017.

KTWO-AM reports U.S. District Judge Alan Johnson found last week that David Michael Chavis was unable to appreciate the wrongfulness of his conduct due to schizophrenia.

Johnson ordered an evaluation to determine if Chavis should remain in custody. A hearing is set for Aug. 9.

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Chavis has been in custody since August 2016 after allegedly holding a Casper office worker hostage at knifepoint while attempting to obtain government documents. Two evaluations determined he was not competent to stand trial for kidnapping and aggravated assault.

He also was found not competent to stand trial over the threatening letter.

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