This is from tonight's episode of Law & Order SVU

Doctor: I excised this from her shoulder. I don't know what it is.
Detective Stabler: That's an RFID chip, and I think I know who put it there.
Doctor: Naomi doesn't... I asked her. Whoever did this to her must have injected this while she was unconscious.
Detective Stabler: High tech way of keeping track of your cheating wife. The guy invented a Ho-Jack.