Jim Conley, the forensics supervisor of the Anaheim Police, tells the story of a murder investigation in which his knowledge of blood spatter was crucial.

In Anaheim, California, a young man who was going to school to become a mechanic, was murdered. He was stabbed repeatedly with a pair of scissors and then, after a short interval, strangled with a shoelace. Jim Conley, the forensics supervisor of the Anaheim Police, tells the story of a murder investigation in which his knowledge of blood spatter was crucial. James Kazakos, a homicide detective, provides further details. A reenactment depicts the crime.—J. Spurlin