Louise Koebnick, an 84-year-old widow who lived independently in Ann Arbor, Michigan, was found murdered in her home on September 30, 1982. Investigators determined she had been beaten, raped, and strangled. Her killing bore strong similarities to the murder days earlier of 85-year-old Marjorie Upson in nearby Ypsilanti, prompting suspicion that a single offender was responsible for both attacks.

Police arrested Michael Darnell Harris in December 1982 at a homeless shelter in Jackson after linking him to a break-in at another elderly woman’s house. Prosecutors charged him in multiple murders across Lansing and Ann Arbor. At a November 2003 trial for Koebnick’s death, jurors convicted Harris of first-degree premeditated murder and first-degree felony murder; he was sentenced to life without parole.

Later reviews included Michigan State Police examination of crime-lab evidence and consideration of advanced DNA testing, and Harris has continued to maintain his innocence. Did anyone in Ann Arbor or Ypsilanti at that time notice suspicious activity around elderly neighbors that could shed light on these cases?