Actus reus - Possession as Criminal Conduct

Possession as Actus Reus Introduction One of the fundamental requirements of criminal liability is the actus reus (guilty act)—the requirement that a crime involve some voluntary action or conduct by the defendant. However, possession presents a unique challenge: it's often not a traditional action at all. This creates a legal puzzle: how can we hold someone criminally liable for merely having something? The answer differs between common law and modern statutory approaches, particularly in the United States. The Common Law Problem Under traditional common law, possession is not considered an act. This creates a conceptual problem: possession is a passive state of affairs rather than an active doing. For example, if someone is found holding stolen property, they're not performing an action—they're simply in a condition of possessing the property. Because common law requires an actus reus (and thus an actual act), possession alone would not technically satisfy this requirement. Despite this conceptual obstacle, the law has long recognized that possession can and should be criminalized in many contexts. The reason is practical and important: possession often creates genuine danger or enables wrongdoing. Possessing weapons during a crime, possessing explosives without a license, or possessing dangerous drugs all represent situations where the government has a legitimate interest in preventing harm or crime. The solution was to criminalize possession statutorily—that is, legislatures created laws that explicitly make possession of certain items illegal. This bypassed the common law limitation by making possession itself the criminal offense, rather than requiring possession to be merely part of an act. How the United States Resolved This: Possession as Voluntary Act To more fully integrate possession into the modern criminal law framework, the United States developed a different approach. Rather than simply accepting that possession doesn't satisfy actus reus but is criminalized anyway, American law recharacterizes possession as a voluntary act. Under this approach, possession is treated as something that a defendant voluntarily maintains or controls. In other words, the focus is on the defendant's continuing voluntary choice to keep something in their possession or control. This might include: Knowingly acquiring something Knowingly keeping it on or about one's person Keeping it in a place where one has control over it (like a car or home) By framing possession this way, courts can analyze it as a voluntary act, thereby satisfying the actus reus requirement. The defendant is not passively holding something; rather, they are actively and voluntarily maintaining that possession. This distinction is important because it allows possession crimes to fit cleanly into the general framework of criminal liability without exception. The defendant's conduct becomes actionable—they are doing something (maintaining possession) rather than simply being in a state.