Hannah Welch was 20 and lived in Hidden Valley Lake, California. She was fatally shot on May 30, 2017; police later identified her death as a homicide. The primary suspect in the case was her father, Steven Russell Miller, who was arrested and charged in connection with her killing.

Miller entered a dual plea of not guilty and not guilty by reason of insanity in early 2018. Multiple mental health evaluations followed; the court initially found him incompetent to stand trial and proceedings were suspended while he was committed to the State Department of State Hospitals for treatment. By 2020 the court had declared him competent and moved the case back onto the calendar. A jury trial was set for January 2021 but later was vacated in favor of a bench trial scheduled for April 2021, with parties appearing remotely.

Anyone who knew Hannah or has information about her death is asked to come forward.