Frank Pembleton

Pembleton was born into a Catholic family in New York City on July 1, 1961. It was implied that he had siblings, but they never appear on the show. He was educated first in a Catholic elementary school and then in a Jesuit high school, a reference to Braugher attending a Jesuit school, St. Ignatius College Prep, in Chicago. Frank later said that "the Jesuits taught me how to think," which comes up on the show from time to time. He knows Latin and Greek and is well versed in Catholic theology. He met his future wife, Mary, on the Great Lawn in Central Park shortly after graduating from the Police academy when he was 24. He claims that he knew as soon as he met her that she was "the one." They were married in 1986.[3]

In October 1988, Frank and Mary moved to Baltimore because Frank wanted to be a detective and felt there was no room for advancement in the NYPD. The move caused a permanent rift between him and his in-laws, since he had moved "their little girl" so far from home. He loved working in Baltimore, however, and Mary got a job as a lobbyist and often took trips to Washington, D.C. where her family lives.

He had become a homicide detective by 1989.[4]

Frank and Mary, once settled in their careers, decided to have a family. They were forced to see a variety of fertility specialists before Mary was able to become pregnant. They had two children, a daughter Olivia (born 1996) and a son, Frank, Jr.

Frank was the only detective to maintain a marriage — the others either never married, had their spouses die, or got divorced. Frank and Mary's did go through some rough times, owing to Frank's incredible drive for work. Even after marriage counseling, Mary felt that he had become too detached from his family. She was also bothered when he lost his faith, especially when he denied Olivia a baptism for many months. Mary left for a couple of months while pregnant with Frank, Jr. but eventually came back. She was happy that he quit the force in the Season 6 finale.

From the first episode right through to the movie finale, references are made to Pembleton's reputation as a "legend" in terms of his skills as a detective; he is especially skilled in interrogation, and is depicted as a master of getting confessions from suspects in "the Box." Through a mixture of sympathy, confusion and fear, Pembleton almost always gets a suspect to crack. At the same time, he often fails to endear himself to his fellow detectives, who resent his black-and-white attitude toward the job and arrogant demeanor.

Frank's religious faith is tested in the three-part premiere of Season 3, when he investigates a series of killings that are revealed to have been religiously-motivated. The thought that God can allow such crimes to be committed greatly disturbs Frank, and he chooses to renounce his faith, refusing even to go to church until near the end of Season 5.

In Season 3, Pembleton is asked by Deputy Commissioner James C. Harris to help Congressman Jeremy Wade cover up a homosexual liaison by dismissing a report that he was kidnapped. Pembleton reaches an agreement with Wade to admit the report was false, but word gets to the press and accusations of a cover up costs Wade an election. When confronted, Pembleton looks to Harris, who denies that he sanctioned any agreement, and Al Giardello (who was deliberately kept in the dark) can offer no help. Disgusted with the situation, Pembleton throws down his badge and quits. However, his intuitive attitude towards his work meshes poorly with his home life, and annoys Mary to the point that she gently pressures him to go back to work, which he eventually does. Pembleton is later called to testify about the cover up and reluctantly states that he decided to offer Wade the deal on his own; however, he continues to harbor a deep resentment for Harris long after the incident is closed.

Except for target practice in Season 4 and re-certification training in Season 5, Frank never fires his gun during the course of the series. It is implied on a few occasions that he is in fact unwilling to use deadly force, which becomes significant during the two-part finale of Season 6.