Legal Powers, Limitations, and Prohibited Conduct
What the exam tests
This domain tests the boundary between private investigation and law enforcement. The central rule is that a Pennsylvania private detective license is a business license, not a police commission. Questions test arrest, search, impersonation, badging, trespass, and access to protected information.
Core rules
- No general arrest power: A private investigator has only the arrest authority of a private citizen, which is narrow. For most matters, the investigator observes, documents, and calls police rather than detaining or arresting.
- No search authority: A private investigator cannot obtain or execute a search warrant. Entering premises, vehicles, or closed containers without consent or legal authority can be criminal trespass or burglary.
- No impersonation: Do not represent yourself as a police officer, sheriff, probation officer, or other public servant. Do not wear a badge, patch, or uniform that reasonably suggests official status. 18 Pa.C.S. § 4912 addresses impersonating a public servant.
- No official databases: A private investigator may not access criminal-history, driver, or other protected systems without authorization. Using a contact to run a plate or records check for personal investigation can violate law and professional ethics.
- Force limits: Force is limited to lawful self-defense and defense of others. A private investigator is not a peace officer and cannot use force to effect a general arrest or search.
Worked example
A client asks the investigator to “arrest” a former employee who is suspected of theft. The investigator may interview witnesses, preserve evidence, and contact police. The investigator should not handcuff or transport the person unless a recognized citizen’s-arrest or shopkeeper’s-privilege situation clearly applies and the risk is managed. The safer course is documentation and police referral.
Traps that cost marks
- Believing the license authorizes arrests or searches.
- Using a badge or saying “I’m a detective” to pressure a subject into cooperating.
- Entering an open garage, hotel room, or vehicle without consent.
- Running records through unofficial contacts.