The correct answer is A. The primary purpose of expert testimony is to help the fact finder understand the evidence or determine a fact in issue by applying specialized knowledge. Federal Rule of Evidence 702 states that an expert may testify when the expert's scientific, technical, or other specialized knowledge will help the trier of fact understand the evidence or determine a fact in issue. That captures the classic role of an expert witness in fraud-related litigation.
Option B is incorrect because deciding the admissibility of evidence is generally a matter for the judge, not the expert witness. Option C is also incorrect because experts ordinarily are not called to opine on whether another witness is truthful; credibility determinations are for the fact finder. Option D is incorrect because experts generally do not decide or directly state whether the accused is guilty; that is the function of the judge or jury after considering all admissible evidence. In CFE practice, expert testimony is valuable because complex accounting records, financial analyses, loss calculations, and fraud patterns often require explanation beyond ordinary lay understanding. Therefore, the best statement of Levi's primary purpose is that he will help the fact finder understand evidence through specialized knowledge, making A the correct answer.

The main purpose of imaging a seized computer's hard drive is to create a forensic copy that can be used for analysis while preserving the original evidence. A forensic image is an exact duplicate of the storage media, created using proper forensic tools and verified for accuracy. Investigators generally analyze the image rather than the original device to reduce the risk of altering original evidence.
Option A is incorrect because forensic analysis should not normally be performed directly on the suspect system. Option B describes documentation of the scene, which is important but not the purpose of imaging. Option D is not the primary objective. Imaging protects evidence integrity and supports later authentication and admissibility.

"Once a denial is uttered, it becomes extremely difficult for the accused to change his response, because doing so would be an admission that he lied. Therefore, the interviewer must prevent an outright denial, thereby making it easier for the subject to confess".
"One of the most effective techniques to stop or interrupt a denial is through a delaying tactic... the interviewer should attempt to delay the outright denial; he should not argue with the accused".
Thus, Charles should interrupt with a delaying tactic.

The Manual says admission-seeking interviews should be conducted only when:
There is reasonable probability the subject committed the act,
All other reasonable investigative steps are complete, and
"The interviewer can reasonably control the place, time, and subject matter of the interview.".Therefore, Erica must ensure control of time, place, and content before scheduling.

Before disposing of evidence, a fraud examiner should consider the organization's document retention policy and any legal duty to preserve evidence. A proper document retention policy identifies what records should be retained, how long they should be retained, and when destruction is permitted.
However, destruction must stop when litigation, investigation, or legal document requests are reasonably anticipated or pending. The type of fraud, such as corruption or asset misappropriation, does not by itself determine whether evidence can be destroyed. Whether the evidence is digital or tangible affects preservation method, not the basic retention decision. Whether evidence would support a conviction is also not the examiner's disposal standard. Evidence handling must follow retention rules, legal obligations, and counsel's guidance.