An Introduction to Crime Reconstruction

Event Analysis

Collect data, establish likely events

Evidence

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Can be one or multiple of the below.

Sequential

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Anything that establishes or helps to establish when an event occurred or the order in which two or more events occurred.

Directional

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Anything that shows where something was goign or where it came from.

Locational

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Shows where something happened, or where something was, and its orientation with respect to other objects at location.

Action

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Defines anything that happened durign the commission of the crime.

Contact

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Something that demonstrates whether and how tow persons, objects, or locations were at one point associated with eachother.

Ownership

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Something that helps answer the Who question with a digh degree of certainty.

Associative

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Usually a form of trace evidence that can be identified or ownership evidence.

Limiting

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Defines the nature and boundries of the crime scene.

Inferential

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Anything that the reconstructionist thinks may have been at the scence when the crime occurred but was not actually found.

Temporal

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Anything that specifically denotes or expresses the passage of time at the the crime scene relative to the commission of the crime.

Psychological

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Any act committed by the perpetrator to satisfy a personal need or motivation.

The Crime Scene

Offender Actions

Precationary Act

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Acts before, during, and after that are intended to confuse or mislead investigators or foresnic experts for the purpose of identifying the perpetrator or his connection to the crime.

Staging

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Manipulation of the crimescene to change the apparent 'motive'.

Ritual or Fantasy

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Can include postmortem mutilation, necrophilia, and purposeful arrangement of a body or items in a scene.

Dynamic Influences Pre-Discovery

Staging

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Observing scene to decide whether or not it was or was not.

Secondary Transfer

Witnesses

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Influences the nature and quality of evidence that is left behind.

Weather/Climate

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Influences the nature and quality of all evidence left behind.

Decomposition

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Can obscure, obliterate, or mimic the evidnce of injury to a body.

Animal Activity/Predation

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The feeding activites of all manner of indigenous wildlife can relocate body parts, obliterate patterns, and further obscure, obliterate, or mimic injury to a body.

Fire

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Can destroy all physical evidence related to criminal activities

First Responder

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First responder is to protect life not preserve evidence. Must refrain from touching evidence at the scene before it is properly documented.

Emergency Medical Team

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May relocate and destroy evidence, obliterate patters, cause transfers, tear clothing, and add artifacts.

Security

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Limiting access to only necessary personnel and controlling it by means of a security officer who logs the entry times, exit tiems, reason for entry, and duties performed of each person who passes though the tape.

Dynamic Influences Post-Discovery

Failure to Search or Recover

Evidence Technicians

Coroner/Medical Examiner

Premature Scene Cleanup

Packaging/Transportation

Storage

Examination by Forensic Personnel

Premature Disposal/Distruction

Chain of Custody/Chain of Evidence