Lawsuit Against Student-Harassing Prosecutor May Proceed has this report.

When Will a Church Be Held Liable for Employment Discrimination?

Almost never, under the - judicially-created ministerial exception to federal anti-discrimination laws. has this report about Skrzypczak v. Catholic Diocese of Tulsa (CA10) (here).

Those Sworn to Enforce the Law May Ignore It

There is no mistake-of-law defense, unless you're a police officer.