5.4.6: Key Takeaways — Read — Invisible Network

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Defense of others has the same elements as self-defense: the individual defended must be facing an unprovoked, imminent attack, and the defendant must use a reasonable degree of force with a reasonable belief that force is necessary to repel the attack.
Real property is land and anything permanently attached to it. Personal property is any movable object.
The defendant can use nondeadly force to defend real or personal property if the defendant has an objectively reasonable belief that an imminent threat of damage, destruction, or theft will occur.
Property owners can use reasonable nondeadly force to eject a trespasser after first asking the trespasser to leave.
Only nondeadly force may be used to defend property; deadly force may be used to defend habitation.
The defendant can use deadly force to defend habitation under modern castle laws if an intruder enters occupied premises, and the defendant has an objectively reasonable belief that the intruder will seriously injure or kill the occupants.
Modern castle laws abolish the duty to retreat when inside the home, occasionally include a presumption that the defendant has an objectively reasonable belief the intruder is going to seriously injure or kill the occupants, and provide civil and criminal immunity from prosecution.
Use of deadly force by law enforcement is considered a seizure under the Fourth Amendment, so law enforcement cannot use deadly force to apprehend or arrest a criminal suspect unless there is probable cause to believe the suspect will inflict serious physical injury or death upon the officer or others.

This page titled 5.4.6: Key Takeaways was last modified on Tue, 01 Sep 2026 13:20:07 GMT and is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by Mark C Fields and Carmyn A. Radetic-Fields.

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