Tonight at 5:35PM EST, on Crime Talk, WRCN 103.9FM, I will have University of Florida Board Certified Forensic Entomologist, Dr. Jason Byrd. We will be discussing the role that insects play in aiding investigators with the Post Mortem Interval (PMI), also known as the Estimated Time of Death (ETD).
Insects found at a crime scene are often overlooked by even the most senior investigators and it’s a huge mistake. Insects, like the blowfly, have a discernible life cycle and have the uncanny ability to smell recently deceased organisms. The blowfly lays its eggs in the moist areas of the body such as: the eyes, nose, mouth, open wounds etc. As they begin to develop, the fly has a discernible life cycle that has many stages. Within each of the stages, is a specific timeframe. At a temperature of 70 degrees, it can take the blowfly egg up to 143 hours to reach maturity.
Here are the general stages: 1. Egg 2. Larva (maggots) 3. Pupa 4. Adult
Maggots are the most recognizable for not only investigators but the general public. Maggots can also identify if the body has drugs or other poisons in the system it will slow down their lifecycle.
To learn more about Blowfly Life Cycle
To learn more about Forensic Entomology