Both lines of clues broke, and the case suddenly fell into a dead end.
Whose DNA data was in that condom?
This question became the key to solving the case.
The victim's phone was not found, and much of the information on the messaging apps was only stored on the phone. The police did not know how many people she contacted there.
Thus, the criminal investigation team turned their attention once more to the remaining phone numbers.
It seemed that taking shortcuts wouldn't work. Li Xiang and his team had no choice but to verify the identity of each phone number's owner the hard way, collecting their biological samples to compare their biological information.
This task was tedious, and everyone in the criminal investigation team was involved—some contacted by phone, some conducted inquiries, and some collected biological samples.
Another week passed before this task was basically completed.
