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.
When police discovered the body of Douglas Beamish's estranged wife, authorities linked 20 cat hairs found on her jacket to a cat owned by Beamish's parents. It was the first time animal DNA was used to solve a criminal case.
S7E5 22 min
