Update: 12:50 p.m. - The Hillsborough County Sheriff's Office has identified the body found in Triple Creek Nature Preserve as missing 13-year-old Janessa Shannon. 

The sheriff's office is actively working this case as a homicide. 

Original Report: The Hillsborough County Sheriff's Office is investigating the discovery of a body in the Triple Creek Nature Preserve. 

Officials said a hiker discovered a badly decomposed body Wednesday morning around 9:40 a.m. in a heavily wooded area of the preserve. 

The Hillsborough County Medical Examiner's Office is working to determine the victim's identity and cause of death. 

No other information on the victim or incident has been released. 

This is a developing story, please check back for updates.