Can I do the same thing with a U.V. blacklight?
One of the biggest misconceptions about semen detection today, which has been largely put forward by what we call “Murder TV” is the almost urban legend like myth that semen stains can be detected with an ultra violet light, which is completely and totally untrue. Things don’t happen like you see on TV, that’s why you can also find backlights being sold to uncover cat urine stains and it’s why many professionals in the forensic community jokingly refer to the television show C.S.I. as “Crime Show Inaccuracy.” Because you cannot detect a semen stain with a backlight – that’s impossible, and anyone who tells you any differently is either not telling the truth or they simply have no idea what they’re doing or talking about. Even a group of doctors couldn’t identify a semen stain with an alternate light source The UV light would only be used if the stain is invisible or if you’re testing a large area such as a carpet or auto interior where you don’t know where to begin testing with the Che