Diamond Bradley, 16, was reported missing on Jan. 24. Her body was found four days later in a ditch off of 850 North Road in rural Putnam County, south of Standard.
Authorities are investigating Bradley's death as a homicide. A forensic pathologist and the Putnam County Death Investigator confirmed Bradley died due to stab wounds on Friday.
The Putnam County Sheriff's Office is also asking anyone in the area of the Casey's General Store or Shell gas station in Spring Valley on Jan. 24 between 1 a.m. and 7 a.m. to contact the Putnam County Sheriff's Office or Spring Valley Police Department. Authorities say Diamond may have been seen in that area.
The sheriff's office said multiple people have been interviewed and numerous tips have been reported.
Call the Putnam County Sheriff's Office at 815-925-7914 or the Spring Valley Police Department at 815-663-2351 if you have information.