Bite mark analysis can be a crucial aspect of a criminal investigation, since a positive identification can establish that the suspect was at the crime scene and in violent contact with the victim. Although human bite marks frequently vary in location, appearance, and severity, there are a few basic principles forensic odontologists can use when examining pattern injuries. Bites usually appear as oval or circular contusions, bruises, or abrasions. Most bites exhibit markings that originate from several of the six upper and/or six lower front teeth. Early recognition and subsequent preservation of a bite mark are critical, especially in a living victim where the injury appearance changes rapidly. Recovery and preservation of bite marks can be accomplished by saliva swabbing, photography, surface molding, and skin removal. 3 photographs