Speaking of Wade Anders, what was the point of putting one of his old stories under the dead man's hand? Not only did the typeface of the title tip Columbo off, so did the missing fingerprints on the back of the paper. Then there are the cigarettes. With as much as the victim smoked, he should have grabbed one of the other used ashtrays and dumped some into the one on the desk. It's almost like Anders was just asking to get caught.