On November 17, 2015, first responders in the Ville neighborhood of Saint Louis found 48-year-old Richard Hill dead inside a residence in the 4400 block of Evans Avenue. Initial observations at the scene did not show obvious trauma or a clear sign of a violent struggle, and police first treated the death as a possible drug overdose.

A later autopsy changed the course of the inquiry: the medical examiner found a fatal gunshot wound that had not been noticed during the preliminary inspection. The St. Louis Metropolitan Police Department reclassified the case as a homicide and opened a murder investigation.

What details about the hours before Hill was found, or anyone who might have been with him that day, could help explain how a gunshot wound was missed at the scene?