It's called fishing. It's what we do when we're not busy with calls and stop people for any and every violation to see what we come up with in the hopes that I find a warrant or suspended driver.
Extending an arm out a window is technically a turn signal. If your state is like mine, you made a turn signal, then didn't turn- a violation. Once a violation has been committed, the officer has the right to check your license and driving record. 22 minutes for a stop isn't unreasonable, especially if the computer system is on the fritz, or dispatch is running slow. The officer (who was most likely fishing), stopped you for it, found nothing when running your license, and "cut you loose" so to speak.
"Harassment" is everyone's favorite buzzword when dealing with the police isn't it? It doesn't matter what your explanation was. Just because it cleared up why you did it, doesn't take away the officers right to run the checks that he did.
What amazes me most is the legwork you put in after a stop in which you didn't get a ticket. I can think of a bunch of things I'd rather be doing with my time than using that time to try to figure out why I wasn't given a ticket.
Pittsburgh Pirates- 1st place NL Central 7/15/11
They've got us surrounded? Good. Now we can fire in any direction, those bastards wont get away this time
An amateur will train until they get it right. A professional will train until they can't get it wrong.