The investigation into the death of a transgender woman found behind an Anaheim Dairy Queen on Thursday morning continues as autopsy results returned an undetermined cause, police said Sunday.

Anaheim police Lt. Bob Dunn said toxicology results – which could take up to four months – may help clarify the circumstances of what the department is calling a suspicious death.

Dunn also said detectives have found evidence suggesting Reyes did not die where she was found Thursday.

According to the Orange County coroner, Cesar Reyes, 28, of Santa Ana, who went by the name Zoraida, was found dead in the parking lot shortly before 11 a.m. Reyes was an activist in the Santa Ana LGBT community.