Juan Jose Calvillo, a 40-year-old church volunteer from Oakdale, California, was found dead on February 19, 2014. His body was discovered on a nature trail by a group of fishermen, and authorities classified the death as a homicide after determining his injuries included gunshot wounds.

Calvillo had last been seen at a church potluck and was reported missing when he didn’t show up for a scheduled construction project at the church, where he regularly volunteered. No arrests or publicly identified suspects have been announced, and investigators say there is no clear motive.

The church has been supporting Calvillo’s family while the investigation remains open. Can anyone who was in Oakdale in February 2014 or who knew Juan Jose provide tips or information that might help investigators?