Kate Beckett:  Sir , um , you okay ?
Captain Victoria Gates: Uh ... just trying to figure out how to tell my sister her case is compromised without her blaming me .
Kate Beckett: Why would she blame you ? You 're just doing your job .
Captain Victoria Gates: There 's a history .
Kate Beckett: Hmm .
Captain Victoria Gates: _ 1998 _ . I had just been made head of Internal Affairs , Elizabeth was in the DA 's office . We called ourselves the Dynamic Duo . At the time , Elizabeth was closing in a heroin ring in east New York , they had an undercover inside . His testimony was key to the case , but ...
Kate Beckett: He was dirty ?
Captain Victoria Gates: He 'd skimmed a few 8-balls off the very bust Elizabeth was building her case around . When my office caught him re - selling it , she came to me , begged me not to file charges . Asked me to think of the greater good . I did my job that day , too . Hasn't been the same between us since .