Factual error: In the movie, Cristina declines to press charges so Jack goes free, but it's the District Attorney who decides whether charges are pressed on behalf of the state.
Factual error: Holding hot metal - ie: the butter knife Benicio Del Torro uses - against your skin would not do any damage to a tattoo, tattoo ink is a mixture of fine metal powder and ink injected beneath the surface layer of the skin. If anything burning the skin actually makes tattoos sink deeper. The removal process is not heat as people think, it is the superheating of the metal in the ink, causing it to explode.
