Testimony by expert witnesses

the expert’s scientific, A witness who is qualified as an expert by knowledge, skill, experience, training, or education may testify in the form of an opinion or otherwise if: (a) technical, or other specialized knowledge will help the trier of fact to understand the evidence or to determine a fact in issue; (c) the testimony is based on sufficient facts or data; (e) the testimony is the product of reliable principles and methods; and (d) the expert has reliably applied the principles and methods to the facts of the case.