<P> The series also provides a few details about Barba's family . He had a difficult relationship with his father; he says that the elder Barba "has been dead 15 years, and my hand still curls into a fist whenever I think of him". He and his mother, Lucia (Mercedes Ruehl), take care of Barba's grandmother Catalina (Anne Betancourt). When Catalina can no longer take care of herself, Barba tries to have her moved to a retirement community against her will, rather than have Lucia leave her job as the principal of a charter school to take care of her . When Catalina dies of a heart attack shortly before the move, Barba blames himself . </P> <P> In the seventeenth season, ADA Barba is relentless in getting perpetrators behind bars and in "Intersecting Lives", Barba goes after Riker's correctional officer Gary Munson (Brad Garrett), who was raping female inmates . As Barba brings charges against him, the entire prison guard system turns against him, feeling that Barba's office rushed to charge their fellow officer based on inmate lies . Barba is ominously threatened in the courthouse elevator and on the steps outside following a press conference . In the following episode, "Heartfelt Passages", Barba reveals he has been receiving threats even before the Munson case; Detectives Carisi and Rollins proceed to help Barba identify them and assign him a security detail . </P> <P> In the season 18 episode "Know It All", when Barba is about to get Benson a search warrant for suspected rapist and murderer David Willard (Chris Diamantopoulos), he recuses himself from the investigation . He deflects when Benson tries to ask him what is going on and she has to get the warrant from another DA . They pick up all of the computers and equipment from David's office; they also find a burner phone . They look at all of the calls and one in particular is from a young girl . Benson and Carisi visit her who says she previously talked to a detective . They realize the detective is fake and that she is connected to Barba . The young girl is the daughter of a witness he once worked with . The mother was a heroin addict . Years prior, it was revealed that he gave her money (knowing that she would use it to buy heroin) in order for her to testify at a trial . The witness later died of an overdose . After that, Barba started sending her daughter money every month . Willard must have hacked his bank account to use it against him . The episode ends with Barba uncertain about his future in the DA's office . In the next episode, "The Newsroom", Barba is back in the courtroom, revealing to Benson that he has just returned from a suspension . </P> <P> Raúl Esparza was approached by Law & Order: Special Victims Unit Executive Producer Warren Leight to appear in the series as an Assistant District Attorney . Leight had previously worked with Esparza in the 2012 Broadway production Leap of Faith and Leight insisted on writing a character for Esparza that would complement his acting strengths, "because he wanted to keep working together". He initially had reservations on accepting the role, as he didn't believe that it would satisfy his onstage work and that acting required a different set of skills . However, Esparza believed the role would offer him "recovery" time from the Leap of Faith Broadway production, which "fell apart". He signed up for the role, as "it was the best time to step away from a place where my heart was broken". </P>

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