Columbo

Columbo was an American crime fiction TV series, starring Peter Falk as Lieutenant Columbo, a homicide detective with the Los Angeles Police Department. The show popularized the inverted detective story format; almost every episode began by showing the commission of the crime and the perpetrator.

The character first appeared in a 1960 episode of the television anthology series The Chevy Mystery Show. This was adapted into a stage play, and a TV-movie based on the play was broadcast in 1968 as the pilot for a series.

The series itself aired regularly from 1971 to 1978, and sporadically from 1989 to 2003.

Columbo was a scruffy looking cop who is usually underestimated by the murderer and his fellow cops. Despite his appearance, he solves all of his cases, managing to come up with the hard evidence he needs in order to get an indictment.

The most entertaining part of the show would be the awkward interactions between Columbo and the suspect. When the other cops asked if he noticed the obvious evidence, Columbo was too busy looking at small clues that many people would not notice.
From: Wikipedia.org

NBC Mystery Movie - Columbo