Forensics ALL

Forensics

Investigation of a crime scene using science.

Locard’s Exchange Principle

Whenever a contact is made, there is an exchange in material.

Who was Locard?

French Criminologist from 1910.

Forms of evidence

Direct evidence and circumstantial evidence.

Direct evidence

Eyewitness accounts, camera footage, confession.

Circumstantial evidence

Implied evidence, trace evidence.

Trace evidence

Any evidence left behind at the crime scene or on the victim or assailant.

Trace evidence classification

Non-biological, biological.

Non-biological

Reduces suspects to a group.

Biological

Reduces suspects to either a small group or one person.

Class evidence

Narrows to a group of people.

Direct evidence

Narrows to one person.