Algor Mortis
Body still warm, no rigor
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Evidence-based calculations Used in clinical settings worldwide Regular monitoring recommended
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Why: This calculation helps assess important health parameters for clinical and personal wellness tracking.
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๐ Very Recent (0-2h)
Body still warm, no rigor
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โฐ Early PMI (2-6h)
Cooling, early rigor, mobile livor
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๐ Intermediate (8-12h)
Full rigor, partially fixed livor
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๐ Extended (24-36h)
Resolving rigor, fixed livor
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โ๏ธ Cold Environment
Cold slows changes
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๐ฅ Hot Environment
Heat accelerates changes
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Educational Purpose Only: This calculator provides rough estimates for educational understanding. Actual forensic investigation requires trained professionals and considers many additional factors.
Sample Scenarios
๐ Very Recent (0-2h)
Body still warm, no rigor
โฐ Early PMI (2-6h)
Cooling, early rigor, mobile livor
๐ Intermediate (8-12h)
Full rigor, partially fixed livor
๐ Extended (24-36h)
Resolving rigor, fixed livor
โ๏ธ Cold Environment
Cold slows changes
๐ฅ Hot Environment
Heat accelerates changes
๐ก๏ธ Temperature Measurements
๐ฌ Post-Mortem Changes
๐ Environmental Factors
๐ Body Characteristics
Post-Mortem Interval Estimate
Estimated PMI: 5.9 hours
Confidence: Very Low
Central Estimate
PMI Range
Temp Drop
Correction
Individual Method Estimates
| Glaister Equation | 7.7 hrs (5.0-11.2) |
| Henssge Nomogram | 5.0 hrs (3.5-7.0) |
| Rigor Mortis | 6.0 hrs (4.0-8.0) |
| Livor Mortis | 4.0 hrs (2.0-6.0) |
๐ PMI Analysis Charts
Method Comparison
Cooling Curve
๐ Key Findings
Body temperature 12.6ยฐF below normal
Rigor mortis: Developing
Livor mortis: Mobile
โ ๏ธ Limitations
All estimates require full forensic analysis
Environmental factors significantly affect accuracy
๐งช Additional Tests Recommended
Vitreous potassium analysis
Toxicology screen
Histological examination
Postmortem Changes Timeline
| Stage | Onset | Peak | Resolution | Key Features |
|---|---|---|---|---|
| Algor Mortis | 0-2 hrs | N/A | 8-12 hrs to ambient | Body cooling; ~1.5ยฐF/hr (varies) |
| Livor Mortis | 20-30 min | 2-4 hrs | Fixed 6-12 hrs | Blood pooling; becomes fixed |
| Rigor Mortis | 2-4 hrs | 12-24 hrs | 36-48 hrs | Muscle stiffening; follows sequence |
| Decomposition | 24-72 hrs | Variable | Variable | Autolysis, putrefaction; highly variable |
Factors That ACCELERATE Changes
Factors That SLOW Changes
PMI Estimation Formulas
Glaister Equation
PMI = (98.6ยฐF - Body Temp) / 1.5
Simple linear estimate; less accurate in extreme temperatures
Henssge Nomogram
Uses body weight correction factor and cooling curves
More accurate; accounts for body mass and ambient conditions
Other PMI Evidence Sources
Entomology
Insect colonization patterns (blow flies, beetles) can provide PMI estimates over days-weeks.
Vitreous Potassium
Eye fluid potassium rises predictably postmortem; useful for 24-100 hour range.
Gastric Contents
Last meal digestion state can help narrow time if meal time known.
Scene Evidence
Newspapers, mail, phone records, last known alive data corroborate biological findings.
Critical Limitations
This calculator provides educational approximations only. Actual time of death determination requires professional forensic examination, toxicology, histology, and expert interpretation.
PMI estimates should always be expressed as ranges with acknowledged uncertainty. Multiple methods should be used in combination. Environmental factors can significantly alter results. This tool is for educational and training purposes only.
For informational purposes only โ not medical advice. Consult a healthcare professional before acting on results.
๐ฅ Health Facts
โ WHO
โ CDC
Forensic Time of Death Estimation
Determining time of death is crucial in forensic investigations. No single method is definitive - multiple indicators are used together.
Algor Mortis
Body cooling ~1.5ยฐF/hr
Rigor Mortis
Onset 2-4h, full 8-12h
Livor Mortis
Begins 30min, fixed 8-12h
Corneal Cloud
Develops 2-12h
Decomposition
Varies with environment
Entomology
Useful for extended PMI
Rigor Mortis Timeline
| Stage | PMI Range |
|---|---|
| None | 0-2 hours |
| Early | 1-4 hours |
| Developing | 4-8 hours |
| Full | 8-14 hours |
| Resolving | 12-36 hours |
| Passed | 36-72 hours |
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