"It's actually not difficult," Holmes said. "To be honest, after hearing what Grigson said before, I thought I had encountered some rare and strange case, at least the kind that happened on the Isle of Arran in 1832. I went to the site and found that there was nothing remarkable about it, so let’s talk about John Textile Factory first.”
Holmes paused, "Do you still remember what we talked about in the afternoon?"
"Are you talking about the impact of profession on your opponent's shape?"
"Yes, I have been doing research in this area recently, and I have interviewed many people from all walks of life in London, including masons, fishermen, cooks, typists, etc... I go out at dawn every morning and have been I stayed in the ghetto until the sun went down and spent a lot of time studying their hand shapes, comparing them with each other and with other people in the same industry. The results were remarkable. I am planning to compile it into a paper. "Holmes said, "Just now at the riverside, I carefully examined the child's palms and compared her palms with my research results. Although her body had been soaked in the water for quite some time, there was no doubt that She works in a textile factory, so your previous observations are correct, because the long hours of work have made her a little weak, and she was probably still sick when the incident happened."
"But there are many textile factories in London. How can you be sure that she is at some John Textile Factory?"
"Good question," Holmes said. "I tend to think that the place where the body was abandoned and the place where the body was found are very close. This can also be easily explained. The time when the body was found was during the day. Although there was a bit of fog on the river, the visibility was good. In fact, it’s not bad, plus there are cruise ships or cargo ships passing by from time to time. If there are corpses on the river, it will be difficult to float too far without being discovered.”
"Wait, but you said before that her body had been in the water for quite some time."
"That's right," Holmes smiled slyly, "but please pay attention to my wording. I said that her body had been soaked in the water for a considerable period of time, not that it had been floating for a considerable period of time."
"What's the difference between the two?"
"Of course, judging from the state of the body, the victim's time of death should have been last night. The assailant accidentally killed her by mistake. After that, he was very panicked. He threw the body into the river and probably tied it with rocks or something. , this way people won’t be discovered, and people will just think that the child is missing. People who can’t survive come and go in this city every day, especially for the lower class like her, not many people care about her. You have to know that the police department’s attitude towards disappearances and murders is completely different.”
"Then why was her body discovered by the patrol again?"
"There are many possibilities. Maybe the perpetrator was too nervous and didn't tie the rope securely. Maybe something happened to break the rope..." Holmes said, "I'm not just guessing, except for the time I mentioned. In addition to the problem, I did find traces of being tied up with ropes on the victim's wrists, which can explain the matter. Her body had been soaked in the water for a long time, but she actually escaped and floated until she was discovered. The place actually doesn’t last long.”
"John's Textile Factory is the nearest textile factory upstream, and it was also the place where I first suspected. In addition, I also found some blue crystals in her hair, which are copper sulfate pentahydrate formed when copper sulfate meets water. Coincidentally, right next door to John's Textile Factory is a chemical factory, which is also the most important basis for my final inference," Holmes said.
"Seeing is worth hearing a hundred times. This has elevated criminal investigation to an almost precise scientific level." Zhang Heng also expressed heartfelt admiration.
Although Holmes didn't say anything when he heard the compliment, the expression on his face still looked like he was very impressed. He paused and continued, "As for the inference about the perpetrator, to put it bluntly, it's nothing remarkable."
"Appreciate further details."
"We all know that the perpetrator wanted to take advantage of the victim, but was met with fierce resistance by the child. She was very brave and kept fighting with the opponent. However, the gap in strength between the two parties was too obvious, so she finally failed. He escaped, but the guy didn't feel comfortable for long before his skin was scratched by the victim. Although the body had been soaked in water for a long time, there was still some skin tissue left between the nails. This was probably why he became so angry. Because of this, he strangled her to death in a fit of rage."
"Wait...you said your child was strangled to death?"
"That's right," Holmes said with certainty.
"But wasn't she hit hard on the head?" Zhang Heng asked.
"As I said, there was a struggle between the two. Judging from the traces of the wounds, I tend to think that her head hit the table, but it was not fatal. What really killed her was suffocation, not the water. Instead of being suffocated, she was choked by someone. There were bruises on her neck, but they were not obvious after being soaked in water. It is probably not easy for ordinary people to find. As for them knowing each other, it was normal. At that time, it was already dark. It’s dark, and it’s almost impossible for men and women who don’t know each other to be in the same room together.”
"What about the height? You said he is almost six feet tall. How did you infer that?" Zhang Heng asked.
"Well, this requires a bit of skill," Holmes said, "I simulated their... well, positions, with the woman at the bottom and the man at the top. Then, by comparing the bruises on the neck, I can determine the direction and angle of the palms, and then The assailant’s approximate height is calculated to be about the same as mine.”
Holmes talked eloquently, and finally clarified all the previous inferences before serving the food.
Many things in this world are like this. When you first hear the conclusion, it feels magical and incredible. But once you know the inference process, it doesn't seem so mysterious anymore, just like a magician's magic trick.
"Forward reasoning is very easy. For example, when you see bread, you know it is breakfast, but the opposite is not true. This is also an ability that detectives need to practice. If you want to learn, you can start by guessing the occupation, starting from a person's sleeves, You can guess what occupation he is engaged in from his shoes, the calluses of his index finger and thumb, fingernails, shirt, expression, etc. For example, the gentleman at the table behind you, just by observing, I can tell that he has just returned from Afghanistan and is a Military doctor.”
Hearing this, Zhang Heng had a strange look on his face for the first time tonight, thinking it couldn't be such a coincidence.
Holmes thought Zhang Heng didn't believe it, so he said again, "We can make a bet to see who of us can accurately tell more things about him. Don't worry, I've never seen him before."
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