The body of Jorge Diaz-Johnston, an LGBTQ advocate and brother of a former Miami mayor, was found in a landfill in Jackson County, Florida.

Diaz-Johnston, 54 years old, went missing on January 3 in Tallahassee, CNN reported, before being found dead in a Jackson County landfill five days later, according to a statement from the Okaloosa County Sheriff’s Office.

His body had been in trash collected that morning. His death is now being investigated as a homicide. Diaz-Johnston and his husband Don Johnson were one of six couples who filed a lawsuit challenging Florida’s ban on same-sex marriage in 2014, before it was federally legalized.