Former Utah teacher faces murder charge after death of ex-husband’s girlfriend

Local News

SALT LAKE COUNTY (ABC4 News) A Utah high school teacher accused of murdering her ex-husband’s girlfriend was formally charged.

Chelsea Cook, 32, faces charges of aggravated murder, burglary and several counts related to discharging a firearm in the presence of a child.

Cook, previously a health teacher at Skyridge High School, is suspected of shooting and killing 26-year-old Lisa Williams inside a Midvale apartment on November 25.

According to charging documents, Cook went her ex-husband’s apartment to deliver some cold medicine for one of the couple’s children.

After a short confrontation, the charging documents said she pointed a gun at Williams, shot and killed her in front of her 3-year-old twins.

Investigators obtained video surveillance from the apartment complex on the night of the murder. Police said the video shows Cook entering the hallway where her ex-husband apartment is located. While standing in the hallway, Cook appears to texting on her phone. Shortly after the ex-husband leaves the apartment and is out of sight, documents state, Cook enters without knocking.

Cook is being held with no possibility of getting out on bail.

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