Collecting evidence is part of a policeman’s job. Trash at the scene of a crime may have been discarded by the perpetrator. The trash is sent to the lab where fingerprints and trace evidence, such as hair and fibers, are collected and recorded.
Once the crime scene has been processed, the detective sifts through the evidence looking for leads. Sometimes the collected evidence doesn’t relate to the crime. Trash may have been discarded before or after the crime by persons other than the perpetrator. Some leads may be ‘red herrings,’ evidence that is misleading or distracting.
This discarded candy packaging was found in my locked office. Initially, it appeared to be damning evidence that I had violated my diet and ate the candy. Upon closer inspection, though, a white Border collie hair was discovered resting on the lower edge near the left corner. Is this a red herring, or evidence that the dog ate my candy?