Forensic entomology is the meaning of life

Flies and other insects are used to determine the PMI. Flies have 5 stages of life and while they're maggots they have 3 phases. I've learned that flesh flies deposit their eggs in open passages of the body like wounds or nasal passages. The holes on the spiracles indicate the phase that the maggot is in. The temperature also affects the rate of growth in maggots.