Stroke of luck?

Just found a great film that we could use as inspiration, D.O.A., its about a man who goes to the police to announce he's just been murdered and then the film uses flashbacks to unravel the mystery before he dies. We could use this sort of narrative ourselves i.e. investigator finds clues and flashbacks results as he formulates his own idea of what happened or something, we see the death and then we see the murder. That kind of thing. Anyway i looked it up on youtube and it turns out its in the public domain so we can watch the whole thing for free, legally. Could be very useful