New details are being released in the case of a mother shot, and killed in a home near Andover.

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Lisa Trimmell, 41, was found dead in June 2018, at her home in the 3200 block of North 159th Street East.

The Sedgwick County District Attorney's Office says a first appearance is set for 9 a.m. Friday in juvenile court for her now 15-year-old son. Court documents show he is being charged with voluntary manslaughter.

Attorneys' for the teen say Trimmell was an alcoholic for several years. They say it led to her being psychologically and physically abusive towards her two sons who were 12 and 14 at the time of her death.

Court documents say Trimmell and her husband Justin were going through the process of divorce. As part of the process, she was ordered to have parenting time with her sons twice a month. That night, the two sons were at the family's home when she allegedly began drunkenly yelling at the youngest son and later attacked the 12-year-old.

The teen's attorney says fearing for his brother's life, Trimmell's oldest son then fetched a loaded gun his mother kept in the home and shot her in the neck. The teen then called 911, but Trimmell died on the scene from her injuries.

According to an autopsy report, Trimmell died "as a result of a gunshot wound of the neck." She also had blunt-force injuries to her trunk, arms and legs.

Attorneys' for the teen say Trimmell had a blood alcohol level of .185 at the time of her death. That's more than twice the legal limit to drive. They say their client acted in self-defense.

Wichita attorney Charley O'Hara is not connected to this case, but says it is not uncommon for it to take awhile to charge someone in a case like this.

"You want to make sure the district attorney's office does it right, it's not a hurried decision," O'Hara says. "We don't want them charging people that shouldn't be charged, that's a terrible thing to have to go through. I don't think there's anything unusual about a delay in a case like this.":

Eyewitness News spoke to a close friend of Trimmell who says there is no record of Trimmell abusing her sons. The friend expects more details will come out in court.