OKLAHOMA CITY (AP) -- The state Medical Examiner's office says its probe into the death of a University of Oklahoma student isn't complete.
According to autopsy results released Tuesday, blast injuries to the head, neck, chest and arms are listed as the cause of death for Joel Henry Hinrichs III. But coroners listed the manner of death as unknown.
The medical examiner's office says its findings and the results of other probes don't reveal conclusive evidence as to the manner of death, which could be suicide, homicide, natural, accidental or unknown.
Chief Investigator Kevin Rowland says the investigation isn't finished.
The 21-year-old Colorado Springs, Colorado student died October 1st when an explosive device attached to his body detonated about 100 yards from the Gaylord Family-Oklahoma Memorial Stadium at OU. FBI agents also reported finding high explosives in his campus apartment.
The medical examiner's office says two drugs commonly found in over-the-counter cold medicines were in his system, but in insignificant amounts.