The ninth ghost and the old bastard

"Yes, there are nail marks and riveted marks, as well as many traces of friction between metal and rope. The technical team has already sent them to the forensics department for examination!" In the office, Ran Tao reported to Zhao Yu,"although we can't see what was used, the traces are all new, so the murderer should have climbed over the wall from there!

"Also, he must have used some kind of advanced mechanical equipment to help him transport the victims over the wall!"

"Boss," cui Lizhu couldn't help but voice her opinion,"think about it. If he had an accomplice, we wouldn't have to go through so much trouble, right?"

"So, the possibility of the murderer being a single person is the highest!

"After all, the probability of a few perverts gathering together is too small!"

Zhao Yu stared at the photos of the crime scene that Ran Tao had given him, but he didn't express his opinion. Instead, he fell into his usual deep thought.