Duty to retreat

In law, the duty to retreat, or requirement of safe retreat, is a legal requirement in some jurisdictions that a threatened person cannot harm another in self-defense (especially lethal force) when it is possible instead to retreat to a place of safety. This requirement contrasts with some other jurisdictions to stand one's ground, meaning being allowed to defend one's self instead of retreating.

It is a specific component which sometimes appears in the criminal defense of self-defense, and which must be addressed if criminal defendants are to prove that their conduct was justified. Depending on the state the criminal defendants have to prove a minimal time period of safe retreat.

English law

In English law the focus of the test is whether the defendant is acting reasonably in the particular situation. There is no specific requirement that a person must retreat in anticipation of an attack. Although some withdrawal would be useful evidence to prove that the defendant did not want to fight, not every defendant is able to escape. In R v Bird the defendant was physically attacked, and reacted instinctively and immediately without having the opportunity to retreat. Had there been a delay in the response, the reaction might have appeared more revenge than self-defense.

Carrying weapons

As to carrying weapons in anticipation of an attack, Evans v Hughes held that for a defendant to justify his possession of a metal bar on a public highway, he had to show that there was an imminent particular threat affecting the particular circumstances in which the weapon was carried.