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.
Bombings are difficult to solve because the perpetrator isn't usually at the scene and the evidence goes up in smoke. In this case, pieces of plastic the size of grains of sand hold the key to finding a murderer.
S10E9 21 min
