Crime Scene Reconstruction Scientific Crime Scene Investigation MTMiller

Crime Scene Reconstruction Scientific Crime Scene Investigation MTMiller

Crime Scene Reconstruction • • • Definition and Components Physical Evidence Best Suited Bloodstain Pattern Analysis Shooting Reconstruction Value and Limitations Sample Case

Definition and Components • Determination of what happened based on what physical evidence is found at the crime scene. • Components • Crime scene & patterned physical evidence • Forensic laboratory test results • Reasoning (common sense!) • Experience

Types of Patterned Evidence • Modus operandi/scene profile patterns • Impressions-fingerprints, footwear, tire tread • Clothing position or damage patterns • Injury or wound patterns • Glass fracture patterns • Fire burn patterns • Bloodstain patterns • Evidence from a firearm

Wound Patterns

Glass Fracture Patterns • Sequence of firing • Direction of force

Burn Patterns

Bloodstain Pattern Analysis • Definition • Value or usefulness • Reconstructions possible with stains • Basic pattern types

Shooting Investigation Reconstructions • Gunshot Residue Patterns – Range of Fire Determinations – Muzzle to Target Distances • Projectiles & Casings – Markings & Trace Evidence – Hole Shapes – Ejection Distance & Arcs • Trajectory Determinations – Physical & Optical Methods

Sample Case for Reconstruction • Miami-Dade County • Officer Involved Shooting – BSP – Trajectory Analysis – Wound Dynamics

Miami, Florida • • • 103 bullet holes in door and walls Wounds in victim Bullet impact mark on shield Bloodstain patterns SWAT officers’ statements Shooter’s and victim’s positions