41. Force against interferer
A person who in using force against another person in circumstances justifiable under this Part, is obstructed or resisted by a third person, may use such force against the third person, reasonable in the circumstances as is necessary for the purpose of overcoming the obstruction or resistance, and if the obstruction or resistance amounts to a crime or to aiding and abetting a crime, may use such force reasonable in the circumstances as is necessary for the purpose of preventing such crime.