16 Dec Hilarious funny scene in the movie. Crime scene dogs used to locate seminal fluid and blood in outdoor crime scenes. •. Presumptive tests and DNA-results confirm the dogs findings. •. Swabbing is the preferred method of sampling. •. Sampling stains should be performed within 24–48 h after a crime. •. Weather conditions, surface and time must be. It does look good doesn't it? There is a comment on that video suggesting that it was a miniature set (more likely vastly overscaled don't you think?), in a water- tank. With that in mind, it makes sense when you watch some of it back. There is a d.