A morally strong woman, she tried to redeem Vic Mackey and Ronnie Gardocki by involving them in a controversial asset forfeiture program designed to clean up Farmington, by destroying the neighborhood drug trade.
However, after finally proving that Mitchell was responsible for ordering the brutal stabbing deaths of two Farmington police officers, Rawling learned that David Aceveda had arranged an immunity deal for the imprisoned drug lord.
Over the course of the show he is seen flirting with several women; he is also admired by Officer Tina Hanlon, though the potential relationship never develops, and during Season Seven is shown taking an attractive Asian woman back to his apartment.
Mackey begins working with ICE, hoping that in exchange for bringing down a Mexican drug cartel both he and Gardocki will be offered jobs and granted immunity for any crimes committed as members of the Strike Team.
When Vendrell finds out the details of the situation, Mackey responds that he would turn himself in for his act of police brutality rather than be blackmailed into forcing Gardocki to recant his sworn statement and let the man who disfigured him go free.
At the series' conclusion, Mackey accepts a deal to receive a job with ICE and immunity from any crimes he committed as a member of the Strike Team in exchange for helping to bring down a Mexican drug cartel.
After the Strike Team robbed millions from the Armenian mob, authorities began an investigation that continued to build up until Lemansky, unable to handle the tension, burned most of the cash in a furnace.
Shane and Army were lured to a meeting, severely beaten by Antwon's men, and then were forced to watch as an informant, a 14-year-old named Angie Stubbs, was murdered in front of them using their own weapons.
Shane spends a moment, crying to himself over the fact that he murdered Lem with no justification and appears to be on the verge of committing suicide when he is interrupted by Danny, who has arrived at the Barn to take care of some paperwork and to show off her son.
Fortunately, the charges were dropped, and Shane, wishing the affair be put behind them, pleaded for Vic to stop his pursuit of Guardo Lima, the Salvadoran drug lord believed to be responsible for Lem's murder.
Shane was crushed to learn of Vic's immunity deal with ICE (U.S. Immigration and Customs Enforcement) during a cell phone conversation, realizing that his last hope of saving himself and his family had disappeared with it.
However, events took a wild turn as the image Juan Lozano took of Aceveda performing oral sex on him suddenly reappeared in the hands of Pezuela, who gave the photo to Mackey as a way to save his job.
The alliance was broken when it was revealed that before Aceveda left his post, he submitted a scathing letter about Mackey to administration, notably accusing him of Terry Crowley's murder; effectively killing any possibility of promotion for Vic.
Aceveda was shocked to learn the dirty secrets of many of the most influential people in Southern California, including public officials, mayoral aides, and the heads of special interest groups.
At the end of that season, Claudette is being groomed to take over running The Barn as the new captain but loses the promotion when she charges a public defender with negligence, resulting in countless convictions' being overturned.
Along with his partner, Detective Claudette Wyms, Dutch is widely considered to be the moral center of the show due to his willingness to do the right thing, despite the temptation to engage in illegal police activities.
Dutch's investigation of the money train ultimately triggered the tragic series of events that led to the death of Vic's close friend, Detective Curtis "Lem" Lemansky.
At the end of season 4, Dutch turned down a chance to replace Monica Rawling as Captain of the Barn, telling Claudette, to her amusement, that the Chief wanted him "to be the spineless, company yes-man, jellyfish.
Dutch told her to just tell the truth, which led to Corrine's revealing to Kavanaugh that Vic had given her $65,000 in cash several months prior, to take care of their children's special needs.
In the Season 5 premiere "Extraction", Dutch nearly strangles to death a man who tried to push Detective Wyms, his only real friend at the precinct, over the second story railing of the Barn.
Shocked, Lem confessed that the stress of hiding the money train loot and the group's various morally questionable actions had resulted in his developing potentially fatal ulcer problems.
Soon after the plea was entered, however, Vic found that Kavanaugh had played his last card, starting an investigation of Lompoc Federal Penitentiary, which was causing Antwon to lose all the creature comforts he'd enjoyed.
Meanwhile, Lem was forced to abandon Vic's original plans for hiding him after he risked his freedom to help out a young child who had been left alone by his parents and had seriously hurt himself in his home's kitchen.
At the end of Season 6, Billings informs the department that he is suing the city for over $3.4 million, stating that injuries sustained from hitting a desk during a fight between Vic Mackey and Jon Kavanaugh resulted in headaches and sensitivity to light.
After the case was closed, Tavon aggressively confronted him and revealed that he remembered everything about their fight, and that he never hit Mara, shaming the cowardly Shane and walking away from their violent history for the last time, satisfied and at peace.
She posed as a prostitute in order to help the Strike Team take down a sex slavery ring, trying to prove that she can hold her own, but later, back on patrol, she failed to identify an undercover officer and allows the real criminal to escape.
He effectively decided the Strike Team's disbandment from his desk in the final season, sealing Vic and Ronnie's ultimate fates and Julien Lowe back to regular police work.
Captain Rawling's obsession with seeing Antwon prosecuted for his part in the murders led her to deliberately sabotage his immunity deal with the DEA, thereby leading Chief Johnson to fire her from the Department.
Vic plans to bust Beltran and serve him up to ICE in order to strike a deal to obtain full immunity on his past crimes, including the execution-style slayings of Terry Crowley, Margos Dezerian, Guardo Lima, and many others.
In the Season One episode "Dawg Days", a dispute between Kern and a rival rapper from another gang known as 'T-Bone' is brought to the attention of the Farmington Division after causing a number of fatalities out on the street.