Law and Order

Detective Frank Cosgrove (born May 11, 1973) was a Senior Detective of the Manhattan North Homicide Squad in the 27th Precinct. He was partnered with Detectives Kevin Bernard and Jalen Shaw.

History[]

Cosgrove and Bernard were partnered after Detective Cyrus Lupo's departure from the squad. They were called in to investigate the murder of entertainer and alleged serial rapist Henry King. When solving cases, Cosgrove can sometimes become abrasive or agitated. (L&O: "The Right Thing")

Cosgrove and Bernard were called to the scene of a gruesome murder, which was staged to look like an overdose. Cosgrove and Bernard broke the news to his parents and later got into a disagreement about race and LGBT issues while walking to the car. After Senator Jack Nathan was brought into the investigation, Cosgrove and Bernard questioned him, and Cosgrove became hostile towards Nathan's attorney. (L&O: "Wicked Game")

Cosgrove became deeply involved in the murder of an old friend, Detective James "Jimmy" Doyle, after he was shot and killed by the sister of the woman he was dating. (L&O: "Black and Blue")

Cosgrove became heavily invested in a case involving a young woman named Ava Marchenko, who was shot by Mark Sirenko. Cosgrove saw her fleeing from Sirenko while he was dining at a cafe with his daughter Lily. During this time, he met his new partner Jalen Shaw, who replaced Bernard. (OC: "Gimme Shelter")

When Sirenko was sentenced to 20 years in prison after he accepted a deal, Cosgrove was disgusted and appalled by the lack of justice for Ava, which he confided in with Lily despite telling the media that he felt justice had been served. (L&O: "Gimme Shelter")

By 2024, Cosgrove was no longer working at the 27th Precinct and was replaced by Vincent Riley. According to Shaw, Cosgrove was dismissed because he was too open and firm with his opinions. (L&O: "Freedom Of Expression")

Trivia[]

  • He is not a big fan of social media, which is why his children don't use it. (L&O: "Filtered Life")
  • He reveals that he wasn't a big reader when he was younger and mostly used Cliff Notes. However, the only book he loved was Lord of the Flies. (L&O: "Almost Famous")
  • Detective Cosgrove celebrates his 50th birthday during the events of "Appraisal".

Appearances[]


Law & Order - Main Characters
Law

Senior Detectives: Max GreeveyPhil CerretaLennie BriscoeJoe FontanaEd GreenCyrus LupoKevin BernardFrank CosgroveVincent Riley

Junior Detectives: Mike LoganRey CurtisEd GreenNick FalcoNina CassadyCyrus LupoKevin BernardFrank CosgroveJalen Shaw

Commanding Officers: Donald CragenAnita Van BurenKate DixonJessica Brady

Order

Executive Assistant District Attorneys: Benjamin StoneJack McCoyMichael CutterNolan Price

Assistant District Attorneys: Paul RobinetteClaire KincaidJamie RossAbbie CarmichaelSerena SoutherlynAlexandra BorgiaConnie RubirosaSamantha Maroun

District Attorneys: Adam SchiffNora LewinArthur BranchJack McCoyNicholas Baxter

Others

Elizabeth OlivetAlfred Wentworth