After his car was forced off the road, Patrick tried to stop the bleeding on his wife's face. When she passed out, Patrick ran to a nearby home, jumped over the fence, and banged on the front door.When the occupants would not let him in, Patrick broke a window of the house, climbed through, and ran toward the telephone.The homeowner grabbed a rifle and shot Patrick in the back.

What defense(s) might be available to the following individuals?