• Start with a broad sweep of the area, noting any scratches in a wall, scuff marks on the floor, or a notarized letter of confession signed by the perpetrator.
  • Wrap a perimeter of yellow barricade tape around all possible suspects.
  • Carefully label and photograph each individual piece of evidence immediately after you’ve tampered with it.
  • Wait a minute. What was that? Go back to that last photograph. Enhance that area. Yeah, right there. Can you zoom in a little? My god, that’s it—what we’ve been looking for this whole time! Right in front of our noses!
  • Any gawkers should be kept barred from the crime scene, unless of course they’re very curious.

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