Mr. Monk Falls In Love - S7-E6
Plot hole: It is not realistic that Miss Zladovic is confronted with the murder weapon for the first time in her flat after she had been arrested and interrogated about the same exact murder days before. It is also impossible that the police did not show her a picture of the murder victim as it is police standard to ask any suspects for connections/relations to "their" victim.
Answer: Notice also that in the opening credits scene when he is touching parking meters her also wipes his hand on his clothes each time he does it.