7's of Investigation/Type of Evidences

Study

Secure the Scene 1

First police officer makes sure the scene is safe and protected so no evidence is destroyed.

Seperate the Witnesses 2

Keep witnesses apart so they don’t influence each other’s stories.

Scan the Scene 3

Look around and decide where photos should be taken, identify possible evidence.

See the Scene 4

Take lots of photos from different angles to capture everything exactly as it is.

Sketch the Scene 5

Draw a detailed sketch showing where objects and evidence are located.

Search for Evidence 6

Systematically look for all possible evidence using patterns (grid, spiral, etc.).

Secure and Collect Evidence 7

Properly package, label, and store evidence so it isn’t contaminated.

Direct Evidence

Shows the crime happened.

Circumstantial Evidence

Points to someone but doesn’t directly prove it.

Physical Evidence

things you can see, touch, or hold that come from the crime scene.

Biological Evidence

Comes from living things.

Class Evidence

Matches a group, not one person.

Individual Evidence

Unique to one person.