Katie McGrath is the wife of Chief Tommy McGrath.
Background[]
Katie and McGrath had been married for 32 years and have three children together, Dylan, Mia, and Shea. Their marriage became turbulent over the years due to McGrath's temper.
On SVU[]
In 2022, Tommy and Katie started having problems on account of McGrath easily losing his temper. Katie was then forced to kick McGrath out of the house and ended up calling the police on him one time, which Fin became suspicious of. Tommy confided in Benson about this incident and Benson encouraged McGrath to get therapy. (SVU: "Tommy Baker's Hardest Fight")
Her husband revealed that the therapy had been helping him and had moved back in with Katie. (SVU: "Promising Young Gentlemen")
When Benson discovered that Shea was raped, Benson crossed paths with Katie and Tommy. When Shea was cooperating with the police about the attack, McGrath lost control and started impulsively threatening suspects and ended up holding the father of one, Mickey Dowling, hostage outside his house. Katie defended McGrath's actions and accused Benson of having a vendetta against him since she was next in line for Garland's promotion. Katie then told Benson that she doesn't want to see her again and Benson kept insisting that she was just doing her job. Afterwards, she and family watch in shock when things at Dowling's house got bad, leading to father and son getting arrested for domestic assault. McGrath took a leave from his job to be there for his family in this time. (SVU: "Duty to Report")