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Welcome to Cold Case Wiki Recent changes / Wiki FAQ 1,568 articles and growing The cast of "Cold Case" are doing their part. Are you? Cold Case Wiki is a collaborative database about the hit CBS TV series "Cold Case" which premiered in 2003. Here, you'll find information on episodes, characters, actors, writers, directors, and all other things "Cold Case". If you notice a page seems to be lacking in information, let someone know, or better yet, fill it in yourself. Just like the cases on the show, every new bit of information is another piece of the puzzle, so join in! Hope lives because the evidence never dies. BEWARE! This wiki can and does post SPOILERS for past and future episodes. Though warnings may be given before giving away plot details from episodes that have not yet aired, users who do not wish to be spoiled navigate the wiki at their own risk.

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O'Leary in 1997

O'Leary in 2008

Daniel O'Leary was a officer of the Philadelphia Police Department in the 1980's and 1990's. O'Leary arrested known stick-up man Pete Doyle in 1985. After Pete's release in 1997, O'Leary murdered Pete after a botched attempt to trick Pete into robbing an armored car for him.

O'Leary, who patrolled North Philly in the 1980's, had a reputation as an aggressive officer, giving suspects a "tour of the city", which involved driving them out to the river, and beating them with his nightstick.

O'Leary also harbored a resentment for Pete Doyle, often seeing him flashing stolen money. O'Leary finally arrested Pete in 1985 just after robbing a check-cashing store in North Kensington, when O'Leary caught him with the money and a .38 Smith and Wesson.

Pete was given a twenty year sentence, serving twelve before being released for good behavior. O'Leary wasted little time in following Pete and harassing him at his job at a bar. O'Leary goaded Pete in front of his son, Petey Jr., but the elder Pete didn't rise to it. O'Leary tried to get Robbery to investigate Pete, but they had no reason to.

O'Leary followed Pete to an Alcoholics Anonymous meeting, where he saw Pete with his old partner, Tommy Connell, wearing a .38. Though O'Leary was eager to lock up Pete again, he wanted him on a felony, rather than a gun charge, and kept watching.

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