Requirements for use of force to protect personal property

Non-deadly force can be used to protect property that is in your lawful possession if the force that is used reasonably appears to be necessary to prevent or terminate an unlawful intrusion onto, or interference with, that property. The use of force to protect property is much more limited than the right to use force to protect oneself or other people. It is important to remember that deadly force can never be used simply to defend property against someone else’s interference with that property, even if that interference is unlawful and even if there is no other way to prevent that interference.

Since you must either own the property or be in lawful possession of it in order to be able to use force to protect it, you are not allowed to use force to protect the property that is in lawful possession of someone else under the common law rule, even if you own the property. .

Force to protect property must be used at the moment of the wrongful intrusion or near the time of the wrongful intrusion. So if you have been wrongfully deprived of your property you cannot use force to regain it or, if it is real property, to re-enter it, if any significant period of time has gone by between your loss property and when you begin to use force to try to get it back. But if you use non-deadly force to regain property immediately after it’s taken or while actively pursuing the person who took the property non-deadly force is justified.

It's also important to know that causing injury or death by using a mechanical device is justifiable only if the person who put the device together and installed it would have been justified in inflicting the injury or death had he actually been present when the person was injured or killed. In other words, the use of a mechanical device is tied directly to your right to use force and the level of force you would be allowed to use.