DUI lawyer in Pittsburgh, Michael Worgul says that expert witnesses are important in the court of law whether they be in a DUI case or not. A witness testifies within the court to the judge, and jury to help better solidify whether the person on trial is either innocent of guilty of the crime suggested. However, in DUI and DUID cases, expert witnesses are extremely important and either will make, or break a case. One can expect that any prosecution with such cases will present the officer who made the arrest, as well as the lab supervisor or technician who conducted the either blood test, or urinalysis, to all add on to why the person is guilty and should be convicted.

Therefore, the defense has a vital role of contributing to its own wellbeing by counteracting all of the prosecution witness statements to better the chance of innocence. Also, some law firms that might also have certifications towards field sobriety tests and chemical testing, can not serve as a witness, but must act a lawyer and ask questions instead of stating facts they may have attained in such research. The primary goal of an expert witness is to support the main idea of whether the evidence present by the prosecution is either relatable to or not towards the prosecutions angle of a guilt. Some examples of such expert witness examinations are included, but not limited to the following:

• Chemical Examination: Experts are able to discuss issues involved in blood and breath tests. For example, the device is not set to proper calibration before a test is administered, a positive or negative result can occur instantly without really getting a true, accurate reading of the driver, or citizen. With these issues, expert witnesses can easily either prove the innocence or guilt.
• Field Sobriety Examination:  Experts are also able to use the performance of someone within a field sobriety test to support innocence or guilt opinions as well as to whether or not the motor vehicle operator was driving while under the influence of alcohol or other drugs at the time of the examination. If performed satisfactory, the exam may prove to show the innocence of the person, or if done with clear impairments with coordination, response, and reflexes, can easily contribute to the guilt of the driver as well. Mental and physical previous impairments also aid to the statements of expert witnesses.