Den "perfekte forbrydelse" findes ikke. Find ud af hvorfor i Forensic Files, hvor virkelige efterforskere sætter spor og beviser sammen for at opklare de mest uhyggelige forbrydelser.
Investigators find a shoe print, several foreign hairs and unknown fingerprints at a murder scene. But they believe the most telling piece of evidence is the bite mark on the victim's chest.
S8E7 22 min
