
Consider the following hypothetical: You are jailed for two years as you await trial for murder. You are facing the death penalty. You have cancer, which had been in remission until you were incarcerated without proper treatment and monitoring. And, it turns out, you were charged based on a false witness statement, a fact that the local prosecutor allegedly encouraged the destruction of evidence to obscure.
Now imagine suing that prosecutor and being told you have no recourse because such government employees are entitled to absolute immunity.