A new science movie frames a scientific question as a murder investigation: who "killed" (meaning weathered) rocks altered in deep weathering zones along a climate gradient in Chile? Detective Hercule Poirot looks for alibis for the suspects: rock fractures, water flow, chemical reagents, or microbes. He engages geologists, geochemists, geophysicists, and microbiologists for a drilling campaign in spectacular landscapes in Chile and in their home laboratories. The movie, produced by the german-chilean ''EarthShape'' project, also shows animations of the processes deep beneath Earth’s surface. The movie show is 30 minutes, followed by a townhall discussion of its scientific questions and approaches for communicating complex science to a general public.