Why are pus cells found in stool? A: Pus cells are commonly found in healthy stool, and they help to ease the passage of stool, according to About Health. However, these pus cells are not visible to the human eye. If pus, or mucus, is visible in the stool, this can indicate the presence of a disease or condition. Continue Reading.
DNA evidence is analyzed using the polymerase chain reaction (PCR) method, which allows for very small samples to be tested and identified. Once the sample is tested, it may be cross-referenced with DNA profiles already in a database or with genetic data provided by a suspect.
The Value of DNA Evidence. DNA is a powerful investigative tool because, with the. exception of identical twins, no two people have the same. DNA. Therefore, DNA evidence collected from a crime. scene can be linked to a suspect or can eliminate a. suspect from suspicion. During a sexual assault, for. example, biological evidence such as hair, skin cells, semen, or blood can be left on the victimâs body or other. parts of the crime scene.