Police on Tuesday identified the victim as 31-year-old Rashawna Weathers of Wilmington.
Officers were called to Kirkwood Park on the city's east side Sunday morning and were directed to a portable toilet on the west end of the park.
Weathers's body was found inside the toilet, covered in blood.
Police say Weathers had been stabbed several times.
The investigation is continuing.
Anyone with information regarding this incident is urged to contact Detective McKenzie Kirlin at (302) 576-3653. Or, if preferred, anyone with information may contact DELAWARE CRIME STOPPERS at 1-800-TIP-3333, or via email: delwarecrimestoppers.org