My wife always used the "my husband is a cop" excuse. Worked most of the time, but I'd find the occasional warning ticket in her glove compartment.
I got a ticket for passing a stopped school bus loading children. It wasn't true but the cops often issue tickets for violations based solely on the bus drivers' claim.
I found out that the violation is not just a fine but a criminal offense that required a trial...it lasted 3 hours. It was me against the assistant district attorney, the bus driver and two cops. I proved that the bus driver was insane and won the case. Now you know what my screen name means.