Columbus, Ohio -- Every time police Sgt. Joseph Hubbard stops a speeder or serves a search warrant, he says he worries that suspects assume they can open fire - without breaking the law. Hubbard, a 17-year veteran of the Police Department in Jeffersonville, Ind., says his apprehension stems from a state law approved this year that allows residents to use deadly force in response to the "unlawful intrusion" by a "public servant" to protect themselves and others, or their property. "If I pull over a car and I walk up to it and the guy shoots me, he's going to say, 'Well, he was trying to illegally enter my property,' " said Hubbard, 40, president of Jeffersonville Fraternal Order of Police Lodge 100. "Somebody is going get away with killing a cop because of this law." Indiana is the first U.S. state to specifically allow force against officers, according to the Association of Prosecuting Attorneys in Washington, which represents and supports prosecutors. The National Rifle Association pushed for the law, saying an unfavorable court decision made the need clear and that it would allow homeowners to defend themselves during a violent, unjustified attack. Police lobbied against it.