Crime scene: 162 mystery solving puzzles to find out who the murderer is

Chapter 29 Disguised Drowning Case

One Sunday morning, the body of an angler was floating on the lake.It looked like he had drowned when the boat capsized while fishing in a rented boat.The time of death was about [-] o'clock on Saturday afternoon.At first the death was considered a simple accident, but after investigation by the criminal police, it was determined that it was a homicide, and the murderer was actually a friend of the deceased because he owed a large debt to the deceased.

But the criminal had an alibi. On Saturday, he rented another boat to go fishing with the victim. He broke up with the victim at around 15 o'clock in the afternoon, and returned to his home in K city alone by the tram at G station at 40:18.The train arrives at K City Station at 30:[-].During this period, the criminal has been sitting on the train, and there is an exact testimony from the conductor.

However, when the criminal police learned that this person was working as a pharmacist in a hospital affiliated to a certain university, they exposed his ingenious means of committing crimes.

So, what method did the criminal use to drown the victim to death?

[Answer] Anesthesia was used.The offender, who was fishing with the victim, drugged the victim to sleep before leaving at [-]pm.Then leave.Not long after, the victim woke up from his lethargy and tried to get up, but his body shook and he couldn't stand steadily, causing the boat to capsize and drown.

(End of this chapter)