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Patricia Holt, 57, is charged with murder after allegedly shooting her boss in the head on July 24 in Texas

In 1986, she was arrested after arriving at Red Hook High School with a loaded gun following a threat to kill her teacher and served five years of probation

Her bail is set at $1,000,000. She has not yet entered a plea and does not have a lawyer

A Texas woman accused of murdering her boss was previously convicted for an incident involving a gun and an authority figure.

Deputies with the Dallas Sheriff's Office arrested Patricia Ruth Holt, 57, after she allegedly shot Carl Donaldson, 47, in the head, according to a copy of the affidavit for arrest warrant obtained by PEOPLE.

Carl worked as the safety manager at Sun Transportation Systems, where Holt had been employe

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