One of the film's most striking features is the casting of in the title role. At the time, Cassetti was a non-professional actor with no prior film experience. Director Cédric Kahn chose him specifically for his:

from its premiere at the Cannes Film Festival .

The 2001 film , directed by Cédric Kahn , is a chilling crime drama based on the real-life spree of Italian serial killer Roberto Succo. The "Non-Professional" Lead

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: His natural Italian accent and unpolished performance contributed to the film’s "fly-on-the-wall" documentary feel.

: Shot using the Super 35 process and released in a 2.35:1 aspect ratio , giving the gritty subject matter a sweeping, cinematic scale.

: It was adapted from Pascale Froment’s book Je te tue. Histoire vraie de Roberto Succo , ensuring a high level of factual accuracy regarding Succo's crimes across France, Italy, and Switzerland.

: The film deliberately avoids "sociological excuses" for Succo's crimes, choosing instead to document his actions with a cold, detached precision.