Isn't it obvious that the mole is Gabriel? He and Brenda have had a love/hate relationship since day one, he has gone behind her back and over her head on numerous occasions, and the nail in the coffin: How much he disagreed with the fact that she let the gangbanger go to get killed. Plus, on the previews of the new show, "Major Crimes", he is the only squad member not in the cast! So, Gabriel it is. -Jonayla.