Jet Li and Jackie Chan now work as a police detective In one of their most famous cases, they were tasked to investigate the arson of a building which led to its collapse. After a bit of investigation, Jet Li found some convincing evidence that a contractor by the name of Mr Foo was responsible for the crime. Jackie however, was uncertain.   ""We've found no tools that could have possibly been used for the job. All the evidence we currently have is circumstantial. The building's collaps…