A fiber is found at a crime scene that appears to be identical to a reference sample taken from an item of clothing belonging to one of the suspects in an investigation. Explain why this evidence alone would not be sufficient to establish a conviction.

Because the suspect may have a reason for his or her fiber being there.

Explanation: if they are a roommate, friend, or someone who had access to the crime scene, the evidence of a matching fiber could easily be explained away. It is best to question a suspect about if they had been to that location before. If they say no, they are locked into that answer, thus there is no innocent excuse for the fiber being present.