Can You Shoot a Trespasser in Colorado? Make My Day and Self-Defense

In Colorado, you can legally shoot a trespasser only in narrow situations, and where the encounter happens decides almost everything. Inside your home, the “Make My Day” law gives you broad authority to use deadly force against someone who has unlawfully entered. Outside the home, on your yard, driveway, or porch, deadly force against a trespasser is almost never justified. Getting that line wrong can mean decades in prison.

Inside the Home: Colorado’s Make My Day Law

The strongest protection for occupants comes from C.R.S. 18-1-704.5, known as the “Make My Day” law. The statute opens by declaring that Colorado citizens “have a right to expect absolute safety within their own homes.”¹

An occupant can use any degree of force, including deadly force, against another person when three conditions are all met:

The other person made an uninvited, unlawful entry into the dwelling.
The occupant reasonably believes the intruder has committed, is committing, or intends to commit a crime inside the dwelling beyond the entry itself.
The occupant reasonably believes the intruder might use physical force, “no matter how slight,” against anyone inside.

That third element is what makes the law so protective. You do not have to believe the intruder will kill you or seriously injure you. A reasonable belief that they might use any physical contact against someone inside is enough. When all three conditions are satisfied, the occupant receives full immunity from criminal prosecution and civil liability.¹

Where the Home Ends

The Make My Day law only applies inside a “dwelling.” Areas that fall outside that protection include your yard, driveway, detached garage, porch, and any outdoor space on your property. Someone standing on your front lawn is in a legally very different situation from someone standing in your living room, even though you own both.

If a trespasser has not entered the structure where you live, the Make My Day statute is not available to you. The general self-defense rules apply instead, and those rules are much stricter.

Outside the Home: The General Self-Defense Rule

Anywhere other than inside your dwelling, C.R.S. 18-1-704 controls. You can use physical force to defend yourself or someone else from what you reasonably believe is the imminent use of unlawful physical force, and the force you use has to be proportional to the threat.²

Deadly force is permitted only when a lesser degree of force isn’t enough and one of the following is true:

You or another person face imminent danger of being killed or suffering great bodily injury.
Someone is using or about to use force against an occupant of a dwelling or business while committing burglary.
Someone is committing or about to commit kidnapping, robbery, or sexual assault.

Those are the only circumstances that justify deadly force outside the home.² Colorado has no stand-your-ground statute, but the state Supreme Court has held in decisions including People v. Garcia (2001) and Idrogo v. People (1991) that you have no duty to retreat when you are in a place you have a right to be. You still have to meet the proportionality and imminence requirements.

Property Alone Is Not Enough

A separate statute, C.R.S. 18-1-706, addresses protecting your belongings. You can use reasonable physical force to stop someone from stealing, damaging, or tampering with your property. Deadly force to protect property is permitted only when the situation independently qualifies as self-defense under 18-1-704.³

You cannot shoot someone for stealing your lawnmower, breaking into your parked car, or vandalizing your fence. You can physically intervene with reasonable, non-deadly force. Pulling a firearm requires a genuine, imminent threat to human life.

What You Can Do About a Trespasser Who Isn’t Threatening You

Someone standing on your land without permission is committing a crime. First-degree criminal trespass into an occupied dwelling is a class 6 felony; entering an unoccupied dwelling or a motor vehicle is a class 1 misdemeanor.⁴ The fact that trespassing is a crime does not give you a right to respond with deadly force.

If a trespasser is in your yard or on an outlying part of your property and is not threatening anyone, you can order them to leave and call law enforcement. You may use reasonable physical force to remove them, meaning force that isn’t intended or likely to cause death or serious injury. Directing someone off your property by the arm is legally very different from pointing a gun at them.

Deadly force against an outdoor trespasser only becomes justified if the encounter escalates to the point where you reasonably believe you or someone else faces imminent death or great bodily harm. A person walking across your field, sitting on your porch, or refusing to leave does not, on those facts alone, create that belief.²

When a Self-Defense Claim Collapses

Even a real threat won’t save your defense if you fall into one of the disqualifying categories in C.R.S. 18-1-704(3):

You provoked the confrontation with intent to cause bodily injury or death. The one exception is if you clearly withdraw and communicate that you’re backing off, and the other person continues attacking anyway.
You agreed to fight, in a form of mutual combat not authorized by law.
Your response was based on discovering or learning about the other person’s gender identity, gender expression, or sexual orientation.

The initial-aggressor rule matters more in trespasser situations than most people think. If you go outside to confront someone, escalate with threats, and they respond physically, your self-defense claim can fall apart. Who started what, and in what order, gets scrutinized closely.²

What You Face If the Shooting Isn’t Justified

If you shoot a trespasser without meeting the legal requirements, the potential charges are severe. Prosecutors can bring anything from felony assault to manslaughter to second-degree murder, depending on the facts and your state of mind.

Second-degree murder is a class 2 felony, covering a person who knowingly causes another’s death. Because a shooting involves a deadly weapon, it’s sentenced as a crime of violence, which pushes the presumptive range to 16 to 48 years in prison. If the killing occurred in the heat of passion after serious provocation, it drops to a class 3 felony.⁵

Manslaughter, which applies when someone recklessly causes another’s death, is a class 4 felony carrying 2 to 6 years in prison.⁶ That charge might apply if a warning shot struck and killed someone, or if lethal force was a reckless overreaction to a non-lethal threat. Any conviction leaves a permanent record and costs you your firearm rights.

Criminal acquittal doesn’t shield you from a civil lawsuit. The injured person or the surviving family can sue in civil court regardless of what happens on the criminal side. Civil cases use a lower standard of proof, so a not-guilty verdict does not prevent a jury from finding you financially liable. A wrongful death claim can seek medical expenses, lost income, pain and suffering, and funeral costs. Colorado caps noneconomic damages in wrongful death cases, but that cap does not apply if the death resulted from a felonious killing, and a jury can also award exemplary damages on top of that for willful and wanton conduct.⁷ The Make My Day law’s civil immunity only applies when the shooting happened inside the dwelling and all three statutory conditions were met.

After a Shooting

Even when your use of force was clearly justified, what you do in the next few hours shapes how the legal system treats you. Call 911 right away and ask for medical assistance and law enforcement. When officers arrive, identify yourself and follow basic instructions, but be careful about giving a detailed statement before you’ve talked to an attorney.

If you don’t want to answer questions, say clearly that you are invoking your right to counsel and your Fifth Amendment privilege. Silence alone is not always enough to protect you; you have to say the words. Expect investigators to work the scene as a potential homicide no matter how obvious the self-defense picture looks to you. Having a lawyer before you give your account isn’t an admission of guilt. It’s the single most important step you can take to protect yourself.