Different insects visit a corpse during different stages of decomposition. Insects can help investigators figure out when a person died, and maybe even the nature of the crime. This will help investigators check the suspect's alibi. Also, since some insects are specific to habitats like the city or rural areas, their presence can help determine if the body was moved.
When a person dies, the body will give off certain odors and will attract certain insects. Blow flies (Calliphoridae) will arrive soon after someone has died and lay their eggs. Investigators can look to see if the insect is in the egg, larvae or pupa stage. This can help determine when the person died.
Flesh flies (Sarcophagidae) will deposit maggots usually around the openings for the eyes, mouth and nose. If the body is badly decomposed, the presence of these maggots may give the investigators a clue of the wound site.
Then, cheese flies might infest the corpse 6 to 9 months after the person died. Also, carrion beetles come when the body is in an advanced stage of decomposition.
If a corpse is badly decomposed, insects might help solve these cases.
Also, insects can reveal clues as to whether the body was covered, buried, or had been outside or indoors. So, insects can be a key in helping the police solve crimes! In Britain, the use of insects is helping to solve about 60 murders per year. Having a forensic entomologist (a scientist that studies insects in death and other legal cases) at a crime scene can be really helpful! #insects #crime