Field sobriety tests are an evidence-gathering procedure. District attorneys realize that it is easier to secure confessions and convictions when they have multiple pieces of evidence, even if just one piece of evidence seems to be convincing enough to succeed. Cops realize this too. Law enforcement officers also realize that if the biological tests that DUI suspects are inevitably subjected to are shown to be faulty (for instance, there was a clerical error at the lab and your sample was lost), then they can still fall back on other forms of evidence (the results of the field sobriety test) to probably secure your conviction anyway.
Latest Answers