Are you an expert on crime series ? So you know that we can estimate the death of a person thanks to his body temperature or thanks to the muscular rigidity. But do you know that the study of bacteria also makes it possible to estimate the time of death ?
Believe it or nor but our body is home to billions of bacteria, specifically 100 000 billions. A large number of indics at the scientific police service.
After death, the body stop making defenses, bacteria can then develop freely. During their development, bacteria will produce a massive amount of gas by fermentation, called putrefaction. This bacterial proliferation causes the appearance of a green spot on the belly, corresponding to the late sign of death (3-4 days after death).
Once the estimated time of death, just find the culprit !
In the majority of cases, the scientific police look for traces of DNA to find the culprit, but there are other ways !
In the United States, scientists have been interested in the characteristics of our commensal flora. The different bacteria present on the surface of our skin are specific to each individual. When we touch an object, unintentionally we deposit bacteria and therefore our identity. A bacterial comparison between an object on the crime scene and a sample of suspects could help to clarify the case.
Bacteria are therefore just like DNA, real tools for the scientific police!
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