Who is Maggie Orestes Gonzalez from Skin Tight and what is their importance?

Margaret Gonzalez was a witness to the disappearance of Victoria Barletta when she worked as a nurse at Dr. Graveline's Durkos clinic. She gave false evidence to the detectives investigating the case but now, four years later, after being left penniless by her deceased husband because of his cocaine habit, decides to extract some more money from Dr. Rudy Graveline. It is Maggie's promise of providing details in the case to Reynaldo Flemm and his TV crew that initiates the sequence of events which leads Mick Stranahan to re-investigate the disappearance of Victoria Barletta.