(KUTV) -- The Lehi high school teacher accused of murdering her ex-husband's girlfriend in front of her twin 3-year-olds, has prior domestic violence and assault charges in front of children.
According to Herriman Justice Court Documents, 32-year-old Chelsea Cook was charged with two counts of domestic violence in the presence of a child as well as an assault charge.
Cook pleaded not guilty to all three misdemeanor charges on November 13, 2018 for the offenses which happened on October 16, 2018.
Cook was a health teacher at Skyridge High School in Lehi. There's no word if the school had known about the domestic violence charges.
Cook was arrested on suspicion of murder Sunday night in Midvale after allegedly shooting and killing her ex-husband Travis Cook's girlfriend, 26-year-old Lisa Williams.
Williams died at a nearby hospital from the gunshot wounds.
Court documents show Travis Cook filed divorce papers against Chelsea Cook in August of 2017 and the divorce was finalized in December of 2017.
Salt Lake City Police are investigating the matter which would normally be investigated by Unified Police.
Unified Police said one of the parties involved in the deadly incident is related to an employee of the department.
You can see the charging documents below.