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CISSP 19.1 - Investigations (Part 3 of 3)
This episode of the ISC2 Certified Information Systems Security Professional (CISSP) exam prep series walks through running an investigation from start to finish, within Domain 7, Security Operations. It shows how a disciplined process keeps an inquiry fair, defensible, and effective, turning suspicion into a solid conclusion while protecting both the truth and everyone involved.
What this episode covers
- Setting up the investigation — a competent team working under an incident response policy with a charter and rules of engagement.
- Five lawful ways to confiscate — voluntary surrender, subpoena, plain view, search warrant, and exigent circumstances.
- Workplace privacy — usually limited on company systems, strengthened by a consent-to-search employment clause.
- Calling law enforcement — a management decision weighing expert firepower against publicity and constitutional limits.
- Search warrants — resting on probable cause and specific scope, where a small miss can invalidate everything.
- Conducting and interviewing — working from a backup, never hacking back, and knowing interview from interrogation.
- Protecting and reporting — locking down logs, guarding evidence integrity, and closing with a final report.
Watch the full episode above for the worked examples and detailed explanations of each concept.
Frequently Asked Questions
How do you set up an investigation the right way?
You start by assembling a team of competent analysts who work under your existing incident response policy and receive a clear charter. The charter defines the scope of the inquiry, the authority and roles of the investigators, and the rules of engagement they must follow. Those rules spell out what actions the team may take at each phase, like when to call in law enforcement, collect evidence, or cut off system access. Without that framing, people improvise, and improvisation gets cases thrown out.
What are the lawful ways to confiscate evidence?
There are five you should know. Voluntary surrender works best when the person is not the guilty party. A subpoena is a court order compelling someone to produce evidence, though it warns them in advance. The plain view doctrine lets an officer seize evidence sitting in plain sight during a lawful duty. A search warrant is reserved for when you must act without tipping off the owner. And exigent circumstances let an officer search without a warrant because evidence would otherwise be destroyed or someone is in danger.
Do employees have privacy at work?
Usually far less than they expect. Outside government workplaces, most jurisdictions hold that employees have little expectation of privacy on company systems, and employers generally have the right to search the electronic systems they own and operate. You can strengthen this by having new hires sign an agreement consenting to search and seizure as a term of employment, which makes confiscation faster. But the moment a search reaches into someone’s person or personal belongings, the law gets complicated, so bring in an attorney.
When should you call in law enforcement, and why do warrants matter?
Calling in law enforcement is a weighty decision that belongs to senior management. The experts bring real firepower through trained cybercrime units, but an investigation may become public and embarrass the organization, and once involved, law enforcement must follow constitutional limits that would not bind a private inquiry. One of those is the warrant requirement: a warrant must rest on probable cause and describe exactly what may be searched and seized, and missing even a small detail can invalidate it and throw out everything it produced.
How do you conduct an investigation and interview people?
Except when capturing live memory, never run your investigation on the compromised system itself: take it offline, make a backup, and work from that backup, never trying to hack back and retaliate. When talking to people, intent matters. Gathering information to help your inquiry is an interview, while questioning someone you suspect of a crime and planning to use their words in court is an interrogation. Plan topics with a checklist, use trained investigators, and consult an attorney, since many laws govern detaining people.
📚 Master the ISC2 CISSP Exam!
Ready to test your knowledge? Access chapter-specific Multiple Choice Questions (MCQs) and full-length practice exams for the ISC2 CISSP certification at RooCloud.com. Solve the chapter-wise questions to reinforce this lesson before moving to the next episode.
Reference: This article is based on concepts discussed in CISSP 19.1 - Investigations (Part 3 of 3).