ForensicSpot9 modules
Forensic Entomology
Insects in death investigation: decomposition and succession, postmortem interval estimation, collection and rearing, entomotoxicology, molecular ID, and testimony.
- 54hours
- 28topics
- 9modules
Module 16 hrs3 topics
Foundations
What forensic entomology answers, its history and landmark cases, and its three branches: medicolegal, urban and stored-product.
Start module- Introduction and Scope of Forensic EntomologyForensic entomology uses insects and other arthropods as evidence in legal investigations, with its most powerful application being the estimation of the postmortem interval. This topic covers what the discipline answers, how it fits inside death investigation, and why it is practiced globally.13 min
- History of Forensic Entomology and Landmark CasesFrom Song Ci's 1247 fly experiment in China to the 20th-century laboratory revival, forensic entomology has a documented history spanning eight centuries of real cases. This topic traces that history through the scientists and investigations that shaped the discipline.14 min
- The Three Branches: Medicolegal, Urban, Stored-ProductForensic entomology divides into three branches: medicolegal (death investigation and PMI), urban (structural damage, neglect, living-person infestations), and stored-product (food contamination and commerce law). This topic covers what each branch does, what legal questions it answers, and how the branches differ in method and application.13 min
Module 26 hrs3 topics
Insects of forensic importance
Insect biology and taxonomy for the entomologist, the flies that arrive first, and the beetles and other insects of the later waves.
Start module- Insect Biology and Taxonomy for the Forensic EntomologistA working knowledge of insect anatomy and development is the foundation of forensic entomology. This topic covers the structural features, life-history patterns, and classification principles that let an entomologist place a species and interpret its developmental stage at a scene.13 min
- Flies of Forensic Importance: Blow Flies and Flesh FliesBlow flies and flesh flies are the most reliable early colonisers of human remains, and identifying them precisely is the first step in any entomological time-since-death estimate. This topic covers the key families, their identifying features, and how they sequence themselves onto remains.12 min
- Beetles and Other Insects of Forensic ImportanceWhile flies dominate the early stages of decomposition, beetles, mites, and moths take over as remains progress into the dry phase. Understanding their roles, identifying features, and succession timing extends the forensic entomologist's reach far beyond the blow fly window.14 min
Module 36 hrs3 topics
Decomposition and succession
The cadaver as a changing habitat, the predictable succession of colonisers, and the blow fly life cycle from egg to adult.
Start module- Decomposition Stages and the Cadaver as a HabitatA corpse passes through five broadly recognized decomposition stages, each creating a distinct chemical and physical environment that selectively attracts different communities of insects and other fauna.12 min
- Insect Succession Waves on a CorpseInsects colonise a decomposing body in broadly predictable waves, each community reshaping the habitat for the next, and the combined succession record allows forensic estimation of postmortem interval beyond what larval age alone can provide.12 min
- The Blow Fly Life Cycle: Egg to AdultThe blow fly completes egg, three larval instars, post-feeding dispersal, pupal, and adult stages on a precise temperature-dependent timeline, and understanding every transition is essential for converting an observed larval stage into a reliable postmortem interval estimate.13 min
Module 46 hrs5 topics
Postmortem interval estimation
The principles of PMI, the thermal-summation model and degree days, larval-age diagrams, the successional method, and the sources of error.
Start module- Estimating the Postmortem Interval: PrinciplesThe postmortem interval and the minimum PMI differ in a precise and practically important way. This topic explains both core estimation methods, the assumptions each rests on, and the conditions under which each method is reliable.13 min
- Temperature, Accumulated Degree Days and Degree HoursThe thermal-summation model converts temperature records into accumulated degree days or degree hours, the currency forensic entomologists use to predict blow fly development rates and back-calculate colonisation dates from larval stage.14 min
- Larval Age and Development: Isomegalen and Isomorphen DiagramsLarval length and weight change predictably with temperature and age. Isomegalen and isomorphen diagrams, developed by Grassberger and Reiter, map these relationships visually and allow the analyst to read larval age directly from a measured specimen at a known temperature.13 min
- The Successional Method of PMI EstimationWhen larval-age alone cannot reach back far enough, entomologists turn to the full insect community as their clock. Successional analysis reads which species have arrived, which have departed, and what that sequence implies about the time since death.14 min
- Sources of Error and Uncertainty in Entomological PMIEvery entomological PMI estimate carries uncertainty from temperature error, maggot-mass heat generation, drugs in the body, local ecology, and physical concealment. Understanding these sources is what separates a defensible estimate from a false-precision number.17 min
Module 56 hrs4 topics
Collection and rearing
Collecting entomological evidence at the scene and at autopsy, preservation and chain of custody, and rearing immatures to an identifiable adult.
Start module- Collection of Entomological Evidence at the SceneA practical guide to collecting insect evidence at an outdoor or indoor death scene, covering what to sample, where to look, killing versus rearing splits, and why ambient temperature logging is as important as the insects themselves.13 min
- Collection at Autopsy and from the BodyHow to systematically collect insect evidence during a formal autopsy, covering body regions, clothing, the body bag, and the documentation of maggot masses before the pathologist proceeds.11 min
- Preservation, Labelling and Chain of CustodyHow to kill, fix, and store insect samples correctly, how to label each container for long-term traceability, and how the entomology-specific chain-of-custody record differs from general evidence handling.11 min
- Rearing Immature Insects to the Adult StageWhy rearing collected larvae to adult emergence is necessary for species identification, how to set up rearing containers with the right food and ventilation, how to control and record temperature, and what development records must be kept throughout.13 min
Module 66 hrs2 topics
Entomotoxicology
Detecting drugs and poisons in carrion insects, how they alter development, and using insects as alternate samples for toxicology and DNA.
Start module- Entomotoxicology: Drugs and Poisons in Carrion InsectsEntomotoxicology examines how drugs, poisons, and other toxic compounds accumulate in carrion insects and alter larval development, offering both a route to PMI correction and a chemical record when tissue is no longer available.15 min
- Insects as Alternate Samples for Toxicology and DNAWhen decomposition removes conventional specimens, insects on the body carry the victim's own DNA and chemical history. This topic covers using larval crop contents for victim DNA, blood-meal identification from adult flies, and species confirmation from both specimen and substrate.17 min
Module 76 hrs3 topics
Specialised sub-fields
Aquatic entomology and submerged remains, urban entomology and neglect, and stored-product entomology and food contamination.
Start module- Aquatic Forensic Entomology and Submerged RemainsHow aquatic insects colonise submerged bodies, which indicator species carry the most evidential weight, and how submersion alters the succession timeline and PMI calculation.14 min
- Urban Entomology: Neglect, Myiasis and Living VictimsForensic entomology applied to living victims: how myiasis is diagnosed and documented in neglect cases, what insect evidence reveals in elder and child abuse investigations, and how the entomologist's testimony fits into legal proceedings.15 min
- Stored-Product Entomology and Food ContaminationHow insects infest stored food, how forensic entomologists identify infestation source and age for contamination litigation, and the regulatory and food safety framework that governs such cases.16 min
Module 86 hrs2 topics
Molecular entomology
DNA barcoding for species identification, and using insect population genetics to infer geographic origin and body movement.
Start module- Molecular Identification of Forensically Important InsectsDNA barcoding and other molecular tools let forensic entomologists identify blow flies, beetles, and other postmortem insects from damaged, immature, or fragmentary specimens where morphology alone fails.14 min
- Population Genetics and Geographic Origin from InsectsPopulation genetics applied to forensic insects can reveal whether a body was moved after death by comparing the geographic haplotype signature of insect populations to known regional baselines.14 min
Module 96 hrs3 topics
Casework, court and quality
How a case is worked end to end, presenting PMI ranges as an expert witness, and the standards, error rates and quality that underpin the field.
Start module- Forensic Entomology Casework and Scene InterpretationHow a forensic entomologist works a real case from scene arrival through laboratory analysis, integrating insect evidence with pathology findings and avoiding the reasoning traps that have led to wrongful PMI estimates.13 min
- The Forensic Entomologist as Expert WitnessHow a forensic entomologist translates casework findings into a court-ready report and oral testimony, including how to frame PMI ranges honestly, meet admissibility standards, and communicate uncertainty to a non-specialist jury.13 min
- Standards, Error Rates and Quality in Forensic EntomologyThe professional bodies, best-practice guidelines, proficiency testing schemes, and validation requirements that define quality assurance in forensic entomology, and why the field's relatively thin error-rate literature remains a live challenge for court admissibility.13 min