A bill by Rep. Scott Perry, R-York, would eliminate the need to retreat under certain circumstances, make law-abiding citizens immune to lawsuits if they injure or kill someone in self-defense and expand the places where deadly force can be used to include a deck, patio, porch and vehicle. "Individuals understand they don't want to wake up at 4 in the morning to the sound of breaking glass and don't want to be thinking about, as they're wiping the sleep from their eyes, whether to defend themselves or not," Mr. Perry said.