Detained vs. Arrested: What's the Difference? (Know Your Rights Basics)

"Am I being detained, or am I free to go?" If you've watched any amount of police encounter footage, you've heard it. Our Buffalo Grove bodycam video is built almost entirely around that question, and around a man's belief that if he isn't under arrest, officers can't hold him.

This guide explains the general difference between the three main types of police encounters in the United States. It's general information, not legal advice. Laws and court interpretations vary by state.

The three types of encounters

1. Consensual encounters

An officer can approach anyone and ask questions, just as any person could. In a purely consensual encounter, you're generally free to decline to answer and walk away. The key question is whether a reasonable person would feel free to leave. If not, it may have become a detention.

2. Investigative detentions ("Terry stops")

In Terry v. Ohio (1968), the U.S. Supreme Court held that police may briefly stop a person when they have reasonable suspicion that the person is involved in criminal activity. In some circumstances, they may also frisk the outer clothing for weapons if they reasonably believe the person is armed and dangerous.

A detention is supposed to be brief and limited to investigating the suspicion. You're not free to leave, but you're also not under arrest. Traffic stops are a common type of detention.

This is exactly what happens on camera in Buffalo Grove. When the man asks, "Being detained mean I have to be under arrest. Is that correct?" the officer answers, "Nope. It does not." Generally speaking, the officer's statement matches the legal distinction.

3. Arrests

An arrest means being taken into custody. It generally requires probable cause, a higher standard than reasonable suspicion: enough facts for a reasonable person to believe a crime was committed and that this person committed it.

A detention can turn into an arrest if officers develop probable cause during the stop, including for something that happens during the stop itself. In the Buffalo Grove footage, an officer eventually tells the man he's under arrest "for obstruction."

What about identification?

This is where many encounters escalate. The answer depends on where you are:

• Some states have stop-and-identify laws that require a person to give their name during a lawful investigative detention. In Hiibel v. Sixth Judicial District Court of Nevada (2004), the Supreme Court upheld Nevada's version. The opinion lists Illinois among the states with such a provision.
• Stating your name isn't always the same as producing an ID card. In Hiibel, the Court noted that Nevada's statute, as interpreted, required a person to disclose their name, not necessarily to show a document.
• Drivers are different. States generally require a driver to produce a license during a traffic stop. Our Peoria traffic stop breakdown shows an argument over exactly that.

Phones, recording and other common flashpoints

Other questions come up often in bodycam videos:

• "Can I make a phone call?" During a detention, officers may tell people to keep their hands visible or put a phone away for safety. Whether a specific order was reasonable depends on the circumstances.
• "Can I record?" Many courts have recognized a right to record police in public, but it's not unlimited, and rules differ by jurisdiction.
• "Can you order me out of the car?" In Pennsylvania v. Mimms (1977), the Supreme Court held that officers may order a driver out of a vehicle during a lawful traffic stop.

Why these encounters escalate

Watching enough footage, a pattern stands out. The legal argument happens during the encounter, and it rarely ends well. People may be right about some of their rights and wrong about others, and a roadside argument is the worst place to sort it out. Physical resistance, even to a stop you believe is unlawful, can lead to separate charges like resisting or obstructing.

That's why many defense attorneys give similar general advice:

1. Stay calm and keep your hands visible.
2. Ask clearly, "Am I free to go?" If the answer is yes, leave calmly. If not, you're likely detained.
3. Don't physically resist.
4. You can generally decline to answer questions beyond what your state requires, and you can ask for a lawyer.
5. Remember details and challenge the stop later, through a complaint or in court.

Again, this is general information, not legal advice. Talk to a licensed attorney in your state about your specific situation.

See it in real footage

• Buffalo Grove: "Am I Being Detained?" breakdown
• Peoria: the "show vs. hand over" license argument
• When Refusing to Leave Goes Wrong

Or browse the full video library. As always, everyone shown is presumed innocent until proven guilty in a court of law.