Pilar Horton-Garcia, 33, was found shot to death near railroad tracks in a remote area of northeast San Antonio on April 30, 2015. The Bexar County Medical Examiner’s Office ruled her death a homicide. Horton-Garcia was a former U.S. Army combat medic and instructor.

Authorities arrested 29-year-old Zachary Duncan on June 5, 2015, after detectives gathered enough evidence to request an arrest warrant; he was charged with shooting Horton-Garcia in the head. Horton-Garcia had experienced homelessness and mental health challenges but was known for advocating for others despite those struggles.

Who knew Pilar or has information about her last movements near the railroad tracks on April 30, 2015?