applied-science

Forensic Science & Criminal Investigation

The science behind crime scene investigation — DNA fingerprinting, blood spatter analysis, ballistic trajectories, and time-of-death estimation.

forensicsDNA fingerprintingballisticsblood spattercrime scenefingerprints

Forensic science applies physics, chemistry, and biology to reconstruct criminal events from physical evidence. Every contact leaves a trace — Locard's exchange principle — and modern forensics transforms those traces into courtroom-ready evidence through rigorous scientific analysis.

These simulations let you explore the quantitative methods behind forensic investigation. Calculate DNA match probabilities using population allele frequencies. Reconstruct blood spatter angles from droplet geometry. Trace bullet trajectories through ballistic models. Estimate time of death using body cooling curves. Match fingerprints by scoring minutiae point correspondences.

5 interactive simulations

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Bullet Trajectory & Forensic Ballistics

Simulate bullet trajectories accounting for gravity, drag, and wind to reconstruct shooting positions and distances in forensic investigations

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Blood Spatter Angle Analysis

Reconstruct the impact angle and origin of bloodstains from droplet geometry — the trigonometry behind bloodstain pattern analysis

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DNA Fingerprinting & Match Probability

Calculate the probability of a random DNA profile match using STR loci allele frequencies — the statistical backbone of forensic genetics

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Fingerprint Minutiae Matching Simulator

Score fingerprint similarity by comparing minutiae points — ridge endings, bifurcations, and their spatial relationships used in automated fingerprint identification

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Time of Death Estimation (Henssge Nomogram)

Estimate postmortem interval from body temperature using the Henssge cooling model — the standard forensic method for time-of-death determination