Which two core elements are typically required to prove most crimes?

• A. Hearsay and probable cause
• B. Probable cause and a warrant
• C. Actus reus and mens rea
• D. Reasonable suspicion and a warrant

Answer: (C)

Criminal liability rests on proving both a guilty act and a guilty mind. The actus reus is the actual conduct—the voluntary act or omission—that violates the law and causes a prohibited result. The mens rea is the mental state at the time of the act, such as intent, knowledge of wrongdoing, recklessness, or negligence. For most crimes, prosecutors must show that the person performed the act and did so with a culpable mental state, linking the physical conduct to the prohibited harm.

The other options mix in procedural or evidentiary requirements rather than elements of the crime itself. Hearsay relates to what can be admitted as evidence in court. Probable cause and a warrant concern when law enforcement can arrest or search. Reasonable suspicion and a warrant pertain to stopping and investigating a person. While these are important in policing and court procedure, they do not define what makes something a crime.