input: [Grievances from 1776] For protecting them, by a mock Trial, from Punishment for any Murders which they should commit on the Inhabitants of these States: [Grievances from 2008] 
output: On several occasions in the past 20 years, Federal agents have murdered U.S. citizens. They have not been prosecuted. Invariably after a pro-forma investigation, they are found to be not culpable of any crime. And, should any state prosecutor attempt to prosecute them for their crimes, the prosecution will be blocked because agents of the Federal Government are immune from prosecution in the state courts for crimes committed while on “official business”