Section 27 — Criminal Code: Use of force to prevent commission of offence

Every one is justified in using as much force as is reasonably necessary to prevent the commission of an offence for which, if it were committed, the person who committed it might be arrested without warrant, and that would be likely to cause immediate and serious injury to the person or property of anyone; or to prevent anything being done that, on reasonable grounds, he believes would, if it were done, be an offence mentioned in paragraph (a).