It is a well-known process to the police, and by means of it you can obtain a photograph of the finger-prints of any object in a very short space of time. 
In this case, the police did not find any fingerprints.
mnli hypothesis: In this case, the police did not find any fingerprints. premise: It is a well-known process to the police, and by means of it you can obtain a photograph of the finger-prints of any object in a very short space of time. 