Find out how to determine the time of death through human bacteria

According to scientific journal Plos One, US criminals and American biologists have developed a new way to determine the exact time of death through a set of bacteria that live on the surface and inside. human body after death.

"Fortunately, we had the opportunity to follow the corpses a few times during their disintegration and we believe this really helped us" teach "computers to screen the data and find This is just a pilot project, but very promising, and I think that such an approach must become a standard in forensics " - Nathan Lents at New York University ( America) explained.

In recent years, scientists have been actively interested in what happens to the human body after death. As a result, they were able to discover "scent" elements to figure out how to detect the smells that affect the brain and mood, to determine which genes in the spore cell. Exams are activated after death and how their proteins are decomposed.

Scientists are very interested in this because they help them more accurately determine the time of death and discover crime faster.

These studies attracted the attention of first-time criminals, because they help them more accurately determine the time of death and discover crime faster.

Researcher Nathan Lents and his colleagues went on to study and decided to find out what causes the changes in body odor and the shape of the body after death - and that is the bacteria. living on the skin as well as the inside of the intestine of the dead body.

Scientists believe that as in living people, the list of microorganisms continuously changes according to the degree of decomposition of corpses and the appearance of new changes in the environment in which they live. Accordingly, knowing the species of bacteria that live in the corpse during different stages of decomposition can predict how long the victim died or was killed.

They tested this hypothesis by watching for a few weeks how 21 rotten corpses died. Of course, such a strange experiment for these corpses was agreed by relatives. Every few hours, researchers collect sample bacteria from the ear canal and corpse nose, then conduct their DNA study and compare them.

To implement this procedure, Nathan Lents and his colleagues created an artificial intelligence system based on neural networks to screen genetic data and isolate what the research team did. center.

They developed an algorithm that could determine the time of death of people who died a week and a month ago with an accuracy of about plus or minus two days. Other analytical methods do not allow that.

The team hopes to quickly apply this method to learning crimes, contributing to discovering the most difficult and hopeless cases.