Are you going to do that, too? >> the blood stains are going to do a hema trace on it for human blood or a primate. >> small. so we're going to apply that solution. if it's blood, it is going to mix and the first thing you are going to see is a small line of pure to tell you if the test is a valid test. then you know you have a positive for human blood. and we do have a line so that is human blood. at this point it's time for the showdown. if we take the two suspects, come back to the office, by the time we get here, i'd be up for probably a day and a half. dude, i am smoked right now. i am ti...