The Roughies Cum Crimes would sit uneasily in the second branch. The plural "Roughies" suggests not one perpetrator but a gang—a common trope of the era (cf. The Texas Chain Saw Massacre , 1974, and The Last House on the Left , 1972).
If such a film existed, its plot would likely follow a standard 70s template: The Roughies Cum Crimes -1976- - Hot Classic - -