Expert testimony is a testimony made by a certified professional such a financial expert witness on a scientific, technical, or professional case. A financial expert witness is frequently called on to give expert testimony because it his or her profession and thus is expected to have expert knowledge in this field. In order for the expert testimony to be accepted, it must be related to the specialized knowledge and must aid the Trier of fact. The opinion of the financial expert witness must be adequately approved both by sound reason and method.
A lawyer is a person who practices law, as a barrister, judge, attorney, counselor or solicitor. Law is the system of rules of conduct established by the sovereigngovernment of a society to correct wrongs, maintain the stability of political and social authority, and deliver justice. Working as a lawyer involves the practical application of abstract legal theories and knowledge to solve specific individualized problems, or to advance the interests of those who hire lawyers to perform legal services.