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.

http://www.dailykos.com/story/2012/12/28/1174361/-NRA-backed-law-allows-civilians-to-kill-police-officers