The processing of a crime scene may typically include the recovery of fingerprints, weapons, and trace evidence. It might also include, on occasion, the examination of an entomological factor. Forensic entomology is the examination of entomological evidence or insect infestation on human remains that can provide estimates of the time of death or postmortem interval (PMI). Forensic entomology has received increased interest by investigators, coroners, medical examiners, and pathologists, focusing on the criminal component of the legal system and dealing with the necrophagous, feeding insects. Insects can be of significant importance in cases of badly decomposed and unidentified remains and with an undetermined time of death. This article examines the stages involved in the decay of a corpse, how insects aid in predicting the PMI, and the collection of insect evidence. Issues for the future of forensic entomology, such as automation are presented and discussed.