Man Buys Broken Car From Retiree, Then He Takes A Look Inside

Final sentence

“Well. Where is that evidence?” the other cop demanded, but Brian shrugged. It was a confusing situation as nobody knew where it could be. Then, a tiny note fell out of the pages. “Check behind the steering wheel,” Brian mumbled. But then he realized it. The critical part of the evidence was already in their hands! If he understood correctly, it was behind the steering wheel of his new car!