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The Crime Scene 

Police are usually the first to arrive at the scene - if the perpetrator is still there they arrest him, and if an ambulance is needed they call one.They may collect evidence.

Crime scene investigators will arrive to collect evidence, the District Attorney may go to the scene, and a medical examiner/coroner will be there if necessary. Detective will also be called to the scene. Any specialists needed will be called.

Crime Scene Guidelines - Procedure Search Operations of a Crime Scene

1. Preparation to move into scene, which officer is going where.

• approach the scene
• secure and protect all surrounding area

2. Initiate Preliminary Survey of scene

• Videotape the scene for the exact placement of all evidence.
• Photograph Scene, all evidence, suspects, as well as the room

3. Conduct Detailed Search and Collect Physical Evidence

4. Prepare Narrative Description, use evidence to come up with a potential timeline of what happened

5. Make a rough sketch of the scene.

• always set the map towards the north, measure the distance from a corner of the room to evidence and then measure the same piece of evidence to another corner to triangulate that piece of evidence

6. Interview witnesses, obtain as much information as the warrant allows. Create possible scenarios to what happened, if possible review footage taken by security cameras or review any other recording devices

7. Conduct final survey.

8. Release crime scene.