Simon is reluctant, but Benson tells him it's better than his daughter visiting him in jail.
At the conclusion of the season 15 finale, Benson becomes the court-appointed custodial guardian of Noah Porter, an orphaned baby.
In a later episode, "Intoxicated", Olivia mentions being engaged briefly when she was 16 to one of her mother's students; when her mother found out, she broke a bottle of vodka and went after Olivia with it.
Olivia fought back, kicked her mother twice, and ran out of the house. She has a younger half-brother named Simon Marsden (Michael Weston).
Benson's life is further complicated when she is named the legal guardian of a young boy named Calvin Arliss (Charlie Tahan).
Calvin's mother, Vivian (Maria Bello), abandons him and flees when Benson's investigation uncovers that Vivian (also a child of rape) may have killed her mother's rapist. Calvin lives with her for a while, until she finds Vivian and her lover Sara have relapsed into drug use.
Wolf conceived Benson as a detective in the Manhattan Special Victims Unit, which investigates sex crimes.Benson's mother Serena (Elizabeth Ashley), an English professor, was an alcoholic who emotionally and physically abused Olivia.In the season 2 episode "Taken", Serena Benson dies falling down a flight of subway stairs outside the entrance to a bar.During the 15th season, she is promoted to Sergeant and appointed as acting commanding officer, in the wake of the retirement of both Sergeant John Munch (Richard Belzer) and Captain Donald Cragen (Dann Florek).During the 17th season, she is promoted to Lieutenant and becomes the squad's official commanding officer.As a result of the incident, Benson blames herself for not checking Munson for weapons before leaving him alone with Dodds.Towards the end of the 18th season episode "Next Chapter", Benson has her first on-duty kill when a rape suspect, former police sergeant Tom Cole (Chris Bauer), becomes dangerously close to shooting Detective Dominick “Sonny” Carisi (Peter Scanavino).is a fictional character on the NBC police procedural drama Law & Order: Special Victims Unit, portrayed by Mariska Hargitay.Benson holds the rank of Lieutenant and is the Commanding Officer of the Manhattan Special Victims Unit of the New York City Police Department, which operates out of the 16th precinct.In "Unintended Consequences", Benson lets her visit and spend time with Noah.At the end of "Intent", she gets a call from Sheila telling her that Noah had been kidnapped in the mall.