According to theCFE Prep - Investigationsstudy guide:
"It is recommended that any witnesses who are considered potentially volatile be interviewed without advance notice. Surprise should be employed in any interview that is considered potentially volatile. In many instances, the potentially volatile respondent is unaware that he is going to be questioned, and will therefore be unprepared. If the interview is not conducted by surprise, the interviewer runs the risk of the respondent not showing up, showing up with a witness, or being present with counsel. A target's friends, relatives, and romantic interests often make for a difficult interview. They perceive that the fraud examiner is deliberately targeting someone close to them."
#Interpretation for this scenario:
* Brianna is described asvery protective of her boyfriend, making her a potentiallyvolatile witness.
* Best practice is to avoid giving heradvance notice(which might increase hostility, resentment, or allow preparation).
* Conducting the interviewwith little or no noticereduces the risk of interference, ensures she is unprepared, and prevents her from appearing with legal counsel or allies.

Digital forensics guidance stresses:
* If the computer is off, do not turn it on, because booting will alter files and timestamps.
* If the computer is on and volatile data is needed (e.g., RAM), a formally trained examiner may collect it live. Otherwise, simply unplugging the system (hard shutdown) preserves volatile evidence better than a graceful shutdown.
Thus, if the evidence exists only in volatile data and the system is running, Nobles may collect it via the normal interface.
# Answer: A. If Lucas's computer is running, Nobles may retrieve data... if the evidence exists only in volatile data

A key principle in fraud examinations is confidentiality. Fraud examiners must avoid tipping off the suspect, which could lead to destruction of evidence or flight. Measures include limiting discussions, informing only those with a legitimate need-to-know, and investigating discreetly.

The Fraud Examiners Manual explains:
"Each transaction on a blockchain ledger is recorded with a cryptographic address... by analyzing these addresses, fraud examiners can sometimes establish patterns and connections that identify users or link them to criminal activity".

Best practices emphasize separation:
* "Interviews should be conducted one-on-one to reduce the possibility of collusion, contamination, or intimidation of witnesses" (Fraud Examiners Manual - Interviewing Guidelines).This ensures independent and uncontaminated statements.