On September 18, 2018, 73-year-old Gaylen R. Bohnenkemper was shot and killed in his Holton, Kansas home. A woman called the Jackson County Sheriff’s Office at about 3 a.m. to report that her son had shot her husband and that she was barricaded inside a bedroom. Deputies rescued the woman and a standoff followed for several hours as the son refused to leave and fired at law enforcement.

The son, identified as 49-year-old Derrick G. Bohnenkemper, surrendered and was taken into custody around 8:30 a.m. Gaylen Bohnenkemper was found deceased inside the house. Derrick Bohnenkemper was charged with first-degree murder and other counts related to the armed standoff. Court filings noted a history of mental illness and he spent more than six months in competency evaluations.

Derrick Bohnenkemper later pleaded no contest to a reduced charge of second-degree murder; aggravated assault charges were dismissed and in February 2021 he received a 155-month prison term, with credit for time served. Did anyone in the Holton area have contact with Gaylen or his family around that time who can add context to what happened?