Laurie Margaret Thompson, 49, was found dead in her Dubois, Wyoming, home on September 25, 2016, with a single gunshot wound to the head. Investigators located a revolver hidden inside the house, a detail officials have said suggested the shooter moved through the residence afterward and had enough familiarity to conceal evidence.

Authorities arrested Lance Clark of Dubois, described in reports as Thompson’s boyfriend; he called police the night she died and said he came home to find her dead. Clark was booked on a second-degree murder charge but prosecutors dropped that charge on November 2, 2016, saying newly developed evidence prevented them from proving he fired the shot. The investigation remains open and officials have not ruled out someone else as responsible.

Did anyone in Dubois know Laurie, Lance, or have information about people who had access to that house on September 25, 2016?