TRACE LAB // Forensic Spatter & Trajectory Studio

Top-Down Microscopic View (Grid = 5 mm) 90° Passive Drip

Interactive Caliper Workbench (Drag across stain to measure) Ratio Guide: Width ÷ Length

3D Red String Room

Drag the room to rotate in 3D. Click any stain to select it, then adjust or snap its string angle to locate the 3D Point of Origin.

Select Investigation / Sandbox

Selected Stain: None — click a droplet on the floor or wall.

String Direction (Azimuth): 0° String Elevation Angle ($\theta$): 45°

3D Convergence: Attach at least 2 strings to triangulate origin.

What-If Hypothesis Test:

Interactive 3D Evidence Room (Drag to Orbit • Click Stains to String)

Drip Trails & Impact Energy

Compare how walking vs. running alters drip spacing, or test how low, medium, and high kinetic energy change spatter droplet sizes.

Experiment Mode

Movement Speed: 1.2 m/s (Walking)

Pattern Notes: Adjust controls and run the simulation to compare evidence patterns.

Evidence Paper / Target Wall Capture Motion & Energy Lab

Bias & Forensic Equity Lab

Science serves justice only when investigators stay objective. Click stains on the map to include or exclude them, and see how Confirmation Bias can frame the wrong conclusion.

Audit Result: Toggle stains on the floor plan to compare selective vs. complete data.

Equity & Diverse Pioneers in Forensics

Dr. Mae Jemison & STEM Access

Objective lab science relies on diverse perspectives questioning assumptions so communities are treated fairly.

Dr. Henry Lee & Pattern Standards

Modern forensic standards demand reproducible math and peer review—never relying on an analyst's gut feeling alone.

Why Math Protects Equity

Historically, unverified forensic "hunches" contributed to wrongful convictions. Transparent geometry lets anyone audit the truth.

Confirmation Bias Simulator (Click stains to toggle evidence inclusion) Scientific Integrity