On the night of June 20, 2018, 41-year-old Lisa Marie Trimmell died at her Wichita, Kansas home from a single gunshot wound to the neck. Her older son later said an argument escalated after she, reportedly intoxicated, became physically aggressive with his younger brother; the 14-year-old then retrieved a handgun kept in the house and fired. He called 911 and Trimmell was pronounced dead at the scene. An autopsy confirmed the single gunshot was fatal and reported a blood-alcohol level more than twice the legal driving limit and signs of chronic alcoholism.

Investigators and prosecutors spent months reviewing whether the shooting was justifiable self-defense or a criminal homicide. More than a year after the shooting the older son was charged with voluntary manslaughter; his legal team argued he acted to protect his sibling. The case later resolved when the now 17-year-old pleaded no contest to aggravated battery and criminal use of a weapon, with prosecutors and defense jointly recommending probation.

Anyone who knew Lisa or the family, or who has information about that night, is asked to come forward.