Lesson on Calculating the Post-Mortem Interval

calculating PMI banner

Courtesy of Patti Bertino’s email post. http://www.bertinoforensics.com/

PLEASE USE DISCRETION: SOME IMAGES ARE GRAPHIC AND MIGHT BE DISTURBING TO STUDENTS

The postmortem interval (PMI), also known as a time since death estimate, aids forensic scientists in death investigations. This lesson will introduce your students to the processes of decay and decomposition, forensic pathology, and forensic entomology. The lesson includes several video lectures, animations, and worksheet exercises with practical applications to explain the concept of PMI and accumulated degree hours (ADH).

Intended Grade level
11-12; content is intended for mature audiences

Before you begin …
Before starting, students should have a basic working knowledge of forensic science, death investigations, and Algebra.

Class time required
Two 90-minute class periods

Materials and Technology Needed
Computer with Internet access and YouTube access enabled, basic calculator

Keywords
PMI, post mortem interval, time since death, entomology, taphonomy, simulated death estimation, PMI app, forensic science, forensic entomology, death investigation, forensic experiment, decomposition, decomp, decomposing pig, insect activity, fly life cycle, CSI, crime scene investigation, forensic education

Link to website lesson: https://canvas.instructure.com/courses/825004