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.
Once the lab can give investigators a full report on these items, they can often be used to prove guilt in court. DNA is a type of physical evidence that is used in many cases, and it is considered highly reliable, especially for excluding suspects. Circumstantial evidence is all the actions that can imply guilt of a suspect.