Columbo?
He's freakin' unbelievable, the way he gets the killer does my nut in, he goes all around the houses:
"so then mr smith, you like dog racing then. I remembered the other day, you said you went down the stud farm to check on the hounds, you told me that the security guard had a day off on that day cos his mother was ill. I found that box of matches on the side in your office you said they were from the garage that fixed your car, What you forgot to mention was that when mrs smith was away the previous night, you paid the security guard to follow mrs smith, where he then murdered your beloved wife with YOUR car, and when he came back to collect his award, you shot him too, and fed him to the dogs"