The outcome of criminal cases should always be decided on evidence beyond reasonable doubt; realistically speaking, the road to that decision is naturally paved with innumerable hurdles which the prosecution has to surmount should it hope to win. To advance this goal, courts often rely on evidence gathered by the investigation or assessment of professionals called expert witnesses. Some of these witnesses include weapons and ballistics experts, criminal psychologists, and forensic medicine specialists.
The trusted medical expert witness can either be specializing in pathology, psychology, dental analysis, toxicology, or many other fields of study that can help the case by providing a detailed profile of the crime, which will be admissible as court evidence. Moreover, expert witnesses also have varying roles to play in the court proceedings, as stated in an article by ExpertPages.com.