After reading the original book, I was thinking about this problem when I saw the truth, but there was an explanation at the end, and Dongye could not have made such a low-level mistake.

First of all, the stone god, that is, the mathematician, aims to help the mother and daughter solve this problem completely, rather than settle down for a while.

Mathematicians dismembered the body and discarded it. Although not found, he can't guarantee that he won't be found.

The reason why he killed the tramp was to perfect the scam and make people think that the tramp was the dead, so that even if the body was found later, no one would suspect that the body was a person who had died once. Naturally, I won't look for mother and daughter.

Also, the deceased had a housing record (original) in the hotel, and there were other people he knew in the movie. Mathematicians dare not say that no one will report it, even if it is only missing. If the body is found in the right place in the future, the mother and daughter will still be found. Even if things changed at that time, it would still pose a certain threat to the mother and daughter.

Mathematicians, as a very logical person, can't just hope that no one calls the police and no one finds the body.

So mathematicians began to have the determination to completely solve the problem for mother and daughter.