The use of ultraviolet (UV) light can be of great assistance in many forms of forensic investigation. Since body fluids like CUM (semen), saliva, perspiration and vaginal fluids are naturally fluorescent, the use of a UV light source offers a unique method for locating these stains. The dried bodily fluids will naturally fluoresce when illuminated with UV light source. We can then isolate the exact location of the stain(s) to test, instead of testing the entire, large pieces of evidence such as a mattress, a carpet, a sheet, an article of clothing, etc.