Jiang Yuan was at the scene, first checking the lower body of the corpse, then taking swabs from the vagina and rectum of the body, before returning with the corpse to the forensic center of the Beijing Bureau.
Although it had been more than a week since the incident occurred, the body was relatively dry and had developed a leathery appearance, which actually slows down DNA degradation. If luck was on their side, some complete DNA might still be retained, and a round of amplification in the machine might yield results.
Alternatively, if the perpetrator was a pervert and did something like necrophilia, traces might be left behind.
