Frank Cosgrove

**Detective Frank Cosgrove** was a detective with the Manhattan North Homicide Squad in the 27th precinct.

## History

After the departure of Detective Cyrus Lupo, Cosgrove joined the Manhattan North Homicide Squad and was partnered with Detective Bernard. Cosgrove and Bernard worked together to investigate the murder of Henry King, a notorious entertainer accused of serial rape.

After a man was found deceased in a suitcase, Cosgrove and Bernard were called in to investigate the murder and they both noticed that the murder was made to look like an overdose. Cosgrove and Bernard both broke the news to the victims' parents who were shocked and upset about his demise. While walking to the car, Cosgrove and Bernard got into an argument about race and issues within the LGBTQIA community. After Senator Jack Nathan became a suspect, Cosgrove and Bernard questioned Nathan and Cosgrove became hostile towards Nathan and his lawyer.

After Cosgrove's old friend, Detective Jimmy Doyle, was murdered, Cosgrove and Bernard were called in to investigate his murder. Cosgrove became heavily upset about Doyle's murder especially when he reunited with Doyle's widow. Cosgrove and Bernard both called Benson to help them investigate the case after someone in connection with the murder was a victim in one of Benson's cases.

After Rollins and Nicole get involved in a shooting, Cosgrove sits down with Nicole who wants to know if Rollins is okay. Cosgrove tells Nicole that the doctors will help Rollins. Benson interrupts Cosgrove and Nicole's conversation and Nicole runs towards Benson and hugs her. Later, after Rublev dies and Sirenko goes to prison for 20 years, Cosgrove has a conversation with Lily about the verdict in the case. Lily tells Cosgrove that 20 years is not long enough and she wishes that there was a way to punish these people so everybody would be safe. Cosgrove tells Lily that her idea is impossible and all they can do is what they can do. (L&O: "Gimme Shelter")

While investigating the murder of a famous author named Christina Watkins, Cosgrove reunited with his mentor, Detective Jerry Ryan, who offered to help him investigate the murder. When an actor named Niles Harper became the prime suspect in the murder, Cosgrove noticed that Ryan was determined to prove Niles was the killer. After Ryan, Cosgrove and Shaw come across Niles' car, Ryan breaks into the car without a search warrant. When Niles approached them at the car and attempted to drive off, Ryan claimed that he noticed a spot of blood which caused Cosgrove to arrest Niles. Later, after discovering Niles' torture chamber, Cosgrove and the team found Christina's necklace which proved that Niles was the killer. Cosgrove found out that Ryan met with Christina's mother to check up on her which caused Cosgrove to become suspicious of Ryan. Cosgrove approaches Ryan with his suspicions and also claims that he knows Ryan planted the necklace at the scene before they got there. After Niles was found guilty of murder, Ryan surprised Cosgrove at his home with a bottle of wine but Cosgrove told Ryan he couldn't accept it and asked him to leave.

While investigating the murder of Jerome Elliot, Cosgrove realises that Jerome's daughter goes to the same school as Lily. One night, when Cosgrove comes home, Cosgrove discusses the case with Julia and tells her that the victim left behind a 16-year old daughter who goes to Lily's school. Cosgrove asks Lily about the girl and Lily claims that she knows the girl slightly. When Cosgrove asks what Sophia said at the retreat, Lily refused to tell him. Cosgrove then manages to convince Lily and Lily claims that Sophia said that her father was abusive and might kill her someday. Cosgrove and Shaw then talk to Sophia in private about what she said at the retreat and claims that she was just venting and that Jerome would never kill her. Later, after Aaron's name comes up in the investigation, Cosgrove and Shaw bring Aaron into the precinct where Aaron suddenly confesses to Jerome's murder. Cosgrove then arrests Aaron as soon as his father arrives. Later, after Yee discovers that Lily sent a text to Aaron about Jerome, Cosgrove confronts Lily about the message and Lily cries and asks him if they could keep this a secret. Cosgrove then confronts Price and tells him about the text message and to avoid putting Lily on the stand. Price said they haven't been able to find other witnesses and have no choice. Lily then testifies where Whitmer accuses Lily of making it up to impress the richer kids. Whitmer then accuses Lily of having suicidal thoughts and that she isn't a credible witness. Cosgrove then stands up for Lily but the judge makes him sit down. Lily then runs out of the courtroom where she tells Cosgrove and Julia that she never said that she was suicidal. Lily then told Cosgrove that she cannot trust him because he promised her that they would keep this a secret. Later, after Aaron was found guilty of murder, Cosgrove meets Julia and Lily at home and puts a blanket over Lily while she sleeps and tells her that he loves her.

Whilst investigating the murder of Sarah Baker and the disappearance of Madison Platt, Cosgrove and Shaw arrest a suspect named Matthew Nelson. After Nelson gets released due to lack of evidence that he murdered Madison, Cosgrove and Shaw go to a warehouse. Cosgrove refuses to wait for backup and he finds Madison who whispers that Nelson is there. Cosgrove then hears a noise and gets into a fight with Nelson. Nelson then ends up shooting Cosgrove and attempts to kidnap Madison. Cosgrove and Shaw manage to stop him where Cosgrove stands over him with the gun. Shaw manages to convince Cosgrove to put the gun down. Cosgrove then collapses and gets taken to hospital. At the hospital, Cosgrove refuses to admit that the wounds were serious and that they should have waited before assuming that Madison was dead.

It was revealed that Cosgrove had left the Manhattan North Homicide Squad and was replaced by Detective Vincent Riley. Later, Riley asks Shaw about Cosgrove's departure and Shaw claimed that Cosgrove was let go because he was too open about his opinions and got jammed up.

### On OC

Cosgrove and Lily have a discussion at a cafe after Lily begs Cosgrove to be homeschooled due to bad things happening at her school. Cosgrove says no to Lily being homeschooled and told her that bad things rarely happen. Cosgrove and Lily then see a young girl, Ava, bleeding out and running past their table. Ava then ends up getting hit by a car and Cosgrove rushes to her side. Cosgrove then signals for an ambulance to be called but then a masked man approaches Ava and shoots her. Cosgrove attempts to chase after him but he ends up getting away. Dixon then tells Cosgrove that he has to work on the case with the new guy, Jalen Shaw. Cosgrove agrees to get partnered with Shaw. Cosgrove and Shaw then broke the news to Ava’s aunt who seemed to blame the police for Ava’s death. The aunt then slapped Shaw out of anger and told Cosgrove and Shaw the story about Ava’s past in Ukraine. Cosgrove then runs Shaw through Ava’s autopsy which shows that Ava was a victim of repeated sexual trauma. Cosgrove believes that Ava was a sex trafficking victim. Cosgrove and Shaw then traced Ava’s lost moment back to the yacht where she escaped from. Cosgrove suspected that a gang member named Mark Sirenko had murdered Ava. Cosgrove then put his hands on Sirenko and threatened him. Sirenko then came under investigation by Homicide and Organized Crime. Later, Stabler discovered that Cosgrove’s actions risked his case against Sirenko. Stabler asked Cosgrove to back off but Cosgrove wasn’t having it. Cosgrove and Shaw met with Bell and Stabler at the Organized Crime Control Bureau and Cosgrove told Bell that his homicide case trumped their organized crime case. Bell told Stabler, Cosgrove and Shaw that they have a lead. Stabler decided to ignore the problems with Cosgrove and tried to find out who murdered Ava. After Stabler uses his informant, Vince, to clone Sirenko's phone, Cosgrove wanted to find out where Stabler got his informant and Stabler tells Cosgrove that he found this kid who beat up a guy twice his size. (OC: “Gimme Shelter”)

### On SVU

While Sirenko house gets raided by the squads, Benson finds scratches on the floor of Sirenko's home and suspects that there might be a secret room. Cosgrove and Stabler then move a shelf and find a secret storage space. Benson then discovers the materials used to create the bomb. Benson orders everyone to turn off their radios. After Sirenko activated a ten-minute timer on a bomb, Cosgrove chases after Sirenko but loses Sirenko and people begin panicking. Cosgrove becomes sure that Sirenko is in the building and finds a random person and throws him out of the building to avoid being hit by the bomb. Cosgrove takes off after Sirenko despite the evacuation order and Cosgrove gets Sirenko just as the bomb goes off. Cosgrove then loses Sirenko again but Stabler sends men in all directions to search for Sirenko. Cosgrove becomes mad at himself for losing Sirenko. Rollins and Stabler then find Sirenko by the subway before Sirenko takes a hostage in the bank. Cosgrove wants to go in but Benson doesn't allow it. Stabler tells Benson that he's going to get eyes on the inside of the bank. Benson then manages to get Sirenko to drop the hostages but Sirenko ends up getting held at gunpoint by Stabler. Cosgrove manages to stop Stabler from killing Sirenko. (SVU: "Gimme Shelter")

## Appearances

* Law & Order:
	+ Season 21: "The Right Thing" • "Impossible Dream" • "Filtered Life" • "Fault Lines" • "Free Speech" • "Wicked Game" • "Legacy" • "Severance" • "The Great Pretender" • "Black and Blue"
	+ Season 22: "Gimme Shelter" • "Battle Lines" • "Camouflage" • "Benefit Of The Doubt" • "12 Seconds" • "Vicious Cycle" • "Only The Lonely" • "Chain of Command" • "The System" • "Land of Opportunity" • "Second Chance" • "Almost Famous" • "Mammon" • "Heroes" • "Fear and Loathing" • "Deadline" • "Bias" • "Collateral Damage" • "Private Lives" • "Class Retreat" • "Appraisal" • "Open Wounds"
* Law & Order: Special Victims Unit
	+ Season 24: "Gimme Shelter"
* Law & Order: Organized Crime
	+ Season 3: "Gimme Shelter"