Forensic Doctor Qin, There Is Only One Hair Left on the Deceased, How to Determine the Cause of Death?

Traveling through a parallel world, Qin Chu's identity is a forensic doctor in a small local county. On this day, a murder occurred in the county, and the criminal police searched for clues to no avail. A criminal policeman suddenly came to find Qin Chu: "Forensic Doctor Qin, there is only one hair left on the deceased, how can you determine the cause of death?" He immediately took out an evidence bag and found a long hair inside! It's really just a long hair! Qin Chu took it casually, opened the bag, smelled it, and said casually: "Such a strong smell of salted fish, I'll drown!" Just kidding, how can one possibly determine the cause of death from a single hair? Do you think it's a murderer's DNA test? Just one hair will do! "Damn it, you really deserve to be Medical Examiner Qin, why didn't I think of that!" Three hours later, the police reported that an unknown female body was found in the XX River, and it was finally determined that she was drowned! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.