Blowflies and AI: A New Way to Read Crime Scene Evidence
In forensic investigations, some of the most useful clues come from places people would not normally think to look. Blowflies are one example.
When a person dies, blowflies can arrive at the body very quickly and lay eggs. These eggs develop into larvae, then pupae, before becoming adult flies. The empty casings left behind during this process can give forensic experts important information about how long a body may have been present.
The challenge is that different blowfly species develop at different rates. To estimate time of death accurately, investigators need to know which species they are dealing with. That is not always easy, especially when only old casings are left behind or when insect material has been exposed to the environment.
New research is now looking at how artificial intelligence can help.
Scientists have developed a method that combines chemical detection with machine learning. Instead of relying only on appearance or DNA, the system reads the chemical fingerprint of blowfly casings and uses AI to identify the species.
This could make the process much faster. According to the research, the method may be able to identify species in around 90 seconds.
That speed matters. In violent crime investigations, time is critical. Faster identification can help forensic teams build a clearer timeline and support decisions earlier in the investigation.
The casings may also hold other useful clues. If a blowfly species is found in a location where it would not normally live, it could suggest that a body was moved. Over time, researchers may also be able to study how chemicals in the casings change with age, which could help estimate how long remains have been in a particular place.
This does not mean AI is replacing forensic experts. The technology still needs expert interpretation and validation. But it does show how forensic science is changing.
Evidence is no longer limited to what can be seen directly. Chemical traces, biological material and AI-driven analysis are giving investigators new ways to read a scene.
Blowfly casings may seem small, but in the right context, they can carry valuable information. With better tools to analyse them, they could become an even more useful part of forensic investigation.
Reference source: https://www.sciencedirect.com/science/article/abs/pii/S2468170925000645