The Content of Evidence

In experiments, skepticism on 16/10/2011 at 1:03 pm

As one begins most murder mysteries, a victim is found dead in a room. A detective finds a security camera that shows only John Doe entering and leaving the room at the time of the murder. The forensics lab then calls to tell the detective that John Doe’s DNA was found on the rim of a glass in the room.

Q: In light of the DNA on the glass, should the detective now give more credence to the hypothesis that John Doe is the murderer?


  1. I would say no. The evidence from the security camera screens off the evidence gained from the DNA. We already knew he was in the room, and we also know more, that he was the only person in the room at the time of the murder. DNA evidence only goes to show the first of these two without pin pointing the time. So the camera evidence is not only stronger, but keeps the DNA evidence as nothing new. Hail to the mighty Reichenbach.

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