"No, they didn't land." I said, "I have two bases.". First, according to the mobile phone cracked by the technical department, there are a lot of self-portraits in it. The photos continued after boarding the ship. There were photos of distant islands taken on the cargo ship, but there were no photos of landing on the island. Although the time is still a little short, but the peach blossoms on the island also opened a lot, the scenery is very beautiful, if landing on the island, she has no reason not to take pictures. Second, the soles of the six dead were clean. In fact, there is mud on the small pier next to each island, and once they land on the island, they will inevitably leave mud marks on the soles of their shoes. "It makes sense, that is to say, the cargo ship is still the first scene." Lin Tao said. I looked at Lin Tao, nodded and said, "Therefore, everything on the cargo ship plays a key role in this case." "There are no key clues on the cargo ship, are there?" The host investigator said, "According to the record of the scene investigation, there is no basis to prove the crime, so how do you determine that this is a homicide case with many deaths and bad nature?" "From my belongings." I said, "It was strange when I first examined the body for clothing.". It looks neat, but it has a deep mystery. I couldn't find anything of value in all my clothes and belongings. It wasn't until we started examining the two women's bodies that we found the problem. "What problem?" "The valuables of the two dead women were hidden in their underwear." I said, "Obviously, this is a protective action to protect one's belongings.". So, this action tells us that this is a robbery case. "Death is on board,Nail production machine, and robbery." The chief investigator hesitated for a moment and said, "That is to drive the ship close and board the ship to commit the crime.". However, even if the crime of robbery can be proved, there is no basis to prove the crime of homicide. "Yes, that's why our forensic doctor needs to find out the cause of death of the deceased." I said, "In this case, we are also embarrassed.". Because from the signs of the body, only carbon dioxide poisoning can explain such a strange collective death. The key to the diagnosis of carbon dioxide poisoning is that the site environment meets the conditions. Obviously, it is impossible to form a carbon dioxide lake in the cabin of a ship. "But if it's carbon dioxide poisoning, how can it be a homicide?" The investigators were confused. "Isn't it carbon dioxide poisoning?" "It's carbon dioxide poisoning." I affirmed, "At first, I couldn't figure out what was going on, but after discovering the frostbite of a deceased's finger, combined with the plastic bags extracted from the scene, and Dabao's dizziness and chest tightness as soon as he arrived at the scene, Coil nail machine ,Automatic nail machine, it was a man-made carbon dioxide lake!" The investigators still didn't react. In fact, it is easy to produce a large amount of carbon dioxide in a short time, and the method is dry ice. I smiled and said, "The temperature of the cabin is high. If the dry ice is thrown directly into the cabin, the dry ice will quickly sublimate into carbon dioxide." "But there is carbon dioxide in the normal air, and it won't kill people, let alone so many people." The investigator questioned. I said, "Under normal circumstances, dry ice is safe except for the danger of explosion and severe frostbite when it is sealed in cans.". However, under special circumstances, dry ice can still be lethal in other ways. Let's calculate an account first. How big is the cabin? The length and width are 3 meters and the height is 1.5 meters, so the volume is 13.5 cubic meters. Excluding the volume occupied by human bodies and sundries, the air in the cabin is about 13 cubic meters. Through on-site investigation, we found ten plastic bags at the scene, each with a 500g logo printed on it. At first, we didn't know what it meant, but now it looks like it's a plastic bag for dry ice. A total of 5 kilograms of dry ice with a density of 1565 kilograms per cubic meter sublimates into 800 times the volume of carbon dioxide, or 2.5 cubic meters. Leakage from bulkhead seams is negligible because of the rapid rate of formation. Then, the concentration of carbon dioxide in the air will reach 20% in half an hour. In fact, in an anoxic environment, the concentration of carbon dioxide reaches 10%, which can lead to paralysis of the central nervous system and death. When dry ice turns into carbon dioxide, because carbon dioxide is heavier than air, it does not leak out of the open door at the top of the cabin, but quickly accumulates and fills the cargo hold, causing death. However, the cargo compartment is not completely airtight, after a day and two nights of drifting on the lake, the carbon dioxide concentration in the cargo compartment has been low to the acceptable range of the human body, so the special police and we did not find any abnormal air in the cargo compartment. Only Dabao, a sensitive individual with poor tolerance to carbon dioxide, will feel abnormal. Dabao gave me a white look. This This is a rare way to kill people! The investigator sighed, "Why didn't they run away?" "The reason for not running away is fear and not knowing the danger." I said, "Frostbite on a victim's finger was caused by trying to pick up a dry ice pack to see what was inside.". This can be confirmed by Lin Tao's analysis of fingerprints on dry ice bags. I don't know if he realized that it was dry ice, not ice. Even if he knew it was dry ice, most people knew that carbon dioxide was non-toxic, but they didn't know that in some special cases, carbon dioxide could be fatal. "Dry ice not only produces carbon dioxide, but also cools down quickly." An investigator asked, "Why didn't the deceased show signs of freezing to death?" I nodded approvingly and said, "Good question.". Dry ice does cool down instantly. But because it sublimates so quickly, it produces enough carbon dioxide to kill people. Popularly speaking, the temperature has not dropped to minus 10 degrees Celsius, has not had time to freeze to death, first reached 10% carbon dioxide concentration, first suffocated to death. In fact,Nail Making Machine price, there was a cold state at the scene, but we didn't pay attention to it. Several of the dead were crowded together and on the bulkhead near the motor of the cargo ship, indicating that they were warming themselves and even hoped that the residual heat generated by the motor would warm them. 。 3shardware.com