Badlands (1973)

Directed by Terrence Malick and starring Martin Sheen and Sissy Spacek, Badlands follows young lovers Kit and Holly as they flee across the American Midwest after Kit begins a violent killing spree. Loosely inspired by the crimes of Charles Starkweather and Caril Ann Fugate, the film combines an outlaw-on-the-run story with an detached, dreamlike portrait of youth and violence. Badlands marked Malick’s feature directing debut.

Criterion Collection

Badlands announced the arrival of a major talent: Terrence Malick. His impressionistic take on the notorious Charles Starkweather killing spree of the late 1950s uses a serial-killer narrative as a springboard for an oblique teenage romance, lovingly and idiosyncratically enacted by Martin Sheen and Sissy Spacek. The film introduced many of the elements that would earn Malick his passionate following: the enigmatic approach to narrative and character, the unusual use of voice-over, the juxtaposition of human violence with natural beauty, the poetic investigation of American dreams and nightmares. This debut has spawned countless imitations, but none have equaled its strange sublimity.

Från IMDB:
An impressionable teenage girl from a dead-end town, and her older greaser boyfriend, embark on a killing spree in the South Dakota Badlands.