Explore the groundbreaking case of Operation Magnum in this 31-minute video presentation by Dr. Robert Green. Delve into the first successful use of familial DNA searching to convict Joseph William Kappen, also known as the Saturday Night Strangler, a Welsh serial killer who committed heinous crimes in 1973. Learn about the murders and rapes of three teenage girls in Llandarcy and Tonmawr, near Port Talbot, and discover how innovative forensic techniques led to Kappen's conviction. Gain insights into the application of familial DNA searching in criminal investigations and its impact on solving cold cases. Understand the significance of this landmark case in the field of forensic science and its influence on future criminal investigations.