What is a forensic 'comparison analysis' of physical evidence?

What is a forensic 'comparison analysis' of physical evidence?

Comparison is quite different than the "what is it" identification. The purpose of the comparison is to make a determination as to the common origin of items of evidence. Did the hair in the crime scene come from the head of a particular suspect? Did a fingerprint found at a crime scene come off the fingers of a certain person who was suspected of being the perpetrator? We undertake comparisons for the purposes of determining common origin.