Overview
The Onion Field is a 1973 nonfiction book by Joseph Wambaugh, a sergeant for the Los Angeles Police Department, chronicling the kidnapping of two plainclothes LAPD officers by a pair of criminals during a traffic stop and the subsequent murder of one of the officers.
Crime
On the night of March 9, 1963, LAPD officers Ian Campbell (age 31) and Karl Hettinger (age 28) were riding in an unmarked police car. They pulled over a 1946 Ford coupe containing two suspicious-looking men at the corner of Carlos Avenue and Gower Street in Hollywood. The two men, Gregory Ulas Powell (age 30) and Jimmy Lee Smith (a.k.a. "Jimmy Youngblood", age 32), had recently committed a string of robberies, and "each had a pistol tucked into his trousers".
Powell, the driver, pulled a gun on Campbell, who calmly told his partner, "He has a gun in my back. Give him your gun." Hettinger did as his partner requested. The two officers were then forced into Powell's car and, within 30 seconds after the traffic stop began, were driven north from Los Angeles on Route 99, to an onion field near Bakersfield, where Campbell was fatally shot. Hettinger was able to escape, running nearly four miles to reach a farmhouse.
From Wikipedia (CC BY-SA 4.0).