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.
DNA evidence is a relatively new instrument of exoneration. The first convicted defendant from a United States prison to be released on account of DNA testing was David Vasquez, in 1989. Recently, DNA evidence has been used to exonerate a number of persons either on death row or serving lengthy prison sentences. As of October 2003, the number of states authorizing convicts to request DNA testing on their behalf, since 1999, has increased from two to thirty.