This 1979 true crime drama opens in Los Angeles in 1963.

Rookie Detective Karl Hettinger (John Savage) has just joined the Felony Squad and met his new partner, Ian Campbell (Ted Danson, making his film debut).  Ian is a tall, somewhat eccentric detective, the type who practices playing the bagpipes in the basement and who takes Hettinger under his wing.

Meanwhile, Jimmy Smith (Franklyn Seales) has just been released from prison.  The nervous and easily-led Jimmy almost immediately runs into Gregory Powell (James Woods), a small-time hood with delusions of grandeur.  Powell is the type who talks a big game but who really isn’t even that good of a thief.  Smith and Powell form an uneasy criminal partnership.  They are easily annoyed with each other but they also share an instant bond.  Though the film doesn’t actually come out and say what most viewers will be thinking, there’s a lot of subtext to a brief scene where Powell appears to caress Smith’s shoulder.

One night, Hettinger and Campbell are kidnapped by Smith and Powell.  Smith and Powell drive them out to an onion field.  Because he’s misinterpreted the Federal Kidnapping Act and incorrectly believes that he and Smith are already eligible for the death penalty because they kidnapped two police officers, Powell shoots and kills Campbell.  (The close-up image of Campbell falling dead is a disturbing one, not the least because he’s played by the instantly likable Ted Danson.)  Hettinger runs and manages to escape.  He saves his life but he’s now haunted by the feeling that he abandoned his partner.

The rest of the film deals with the years that follow that one terrible moment in the onion field.  Treated as a pariah by his fellow cops, Hettinger sinks into alcoholism and eventually becomes a compulsive shoplifter.  Smith and Powell, meanwhile, use a variety of tricks to continually escape the death penalty and to keep their case moving through the California justice system.  Powell, for instance, defends himself and then later complains that he had incompetent counsel.  Smith, meanwhile, is defended by the infamous Irving Karanek, a legendary California attorney who specialized in filing nuisances motions.  (Later Karanek found a measure of fame as Charles Manson’s attorney.  Eventually, he had a nervous breakdown in 1989, lived in his car, and was briefly suspended by practicing law.)  While Smith and especially Powell quickly adjust to being imprisoned, Hettinger spends the next decade trapped in a mental prison of guilty and bitterness.

Based on a non-fiction book by Joseph Wambaugh, The Onion Field is a compelling look at a true crime case that continue to resonate today.  The film can be a bit heavy-handed in its comparisons between the two partnerships that define the story.  Both Hettinger and Smith are young and neurotic men who find themselves working with a more confident mentor.  The difference is that Hettinger’s mentor is the cool, composed, and compassionate Ian Campbell while Smith’s sad fate is to be forever linked to the erratic Gregory Powell.  While the film may have the flat look of something that was made for television, it’s elevated by the performances of its lead actors.  James Woods give an especially strong performance as the cocky Powell, a loser in the streets who becomes a winner behind bars.  Over the course of the film, he goes from being a joke to being the prisoner that others come to for legal advice.  John Savage, meanwhile, poignantly captures Hettinger’s descent as the trauma from that night leaves him as shell of the man that he once was.

The film’s supporting cast is full of familiar faces.  Christopher Lloyd and William Sanderson show up as prisoners.  Ronny Cox plays the detective in charge of the onion field investigation.  David Huffman plays a district attorney who is pushed to his breaking point by the obstructive tactics of Smith’s attorney.  Priscilla Pointer play Ian Campbell’s haunted mother.  All of them do their part to bring this sad story to life.

The Onion Field is a chillingly effective true crime drama and a look at a murder that was inspired by one man’s inability to understand federal law.