Wasn't that Omar's brother? No-heart Anthony?
I think thats what McNulty tells Kima, and Bubs later on who then can't believes she calls herself Baltimore Po-lice and not know that

Long established. Can't remember the episode but he's going on about having a thing for powerful women "Michelle Obama, Condoleeza Rice, Oprah…." and then closeup of him realizing that it may not be the powerful trait