What are two forms of discovery? What are the two roles of a computer forensics specialist in pre-trial or courtroom proceedings? Why should the qualifications of potential witnesses be evaluated?...

What are two forms of discovery? What are the two roles of a computer forensics specialist in pre-trial or courtroom proceedings? Why should the qualifications of potential witnesses be evaluated? What happens when attorneys fail to do so? Which information about potential witnesses should be verified before making a decision as to their competency to participate in a trial? How can this be accomplished?