A mass shooting in a quiet Butler Township neighborhood near Dayton ended with four people dead on August 5, 2022. Eva Knox, 78, also known as Sally, and her husband Clyde Knox, 82, were shot at their home on Hardwicke Place. Neighbors Sarah Anderson, 41, and her 15-year-old daughter Kayla Anderson were also killed after Sarah returned from grocery shopping and was shot in her garage; the gunman then shot Kayla while she was on the phone.

Prosecutors say the shooter next went to the Knox residence, shot Eva in the doorway of a detached garage and Clyde as he sat in a lawn chair. All four victims were pronounced dead at the scene. The primary suspect, 39-year-old neighbor Stephen Marlow, fled, was arrested in Lawrence, Kansas, and extradited to Ohio. A Montgomery County grand jury later indicted Marlow on multiple counts including aggravated murder and announced death-penalty specifications.

Marlow’s lawyers pleaded not guilty by reason of insanity, and court-ordered treatment and evaluations followed. After months of testing, a judge found him incompetent to stand trial and unrestorable within the legal time limit in December 2024, leaving the case in legal limbo.