The evil Wendy Allen
Wendy Allen (Jaimi Paige) is a villainess from Rizzoli & Isles' sixth season finale, "A Shot in the Dark" (airdate March 15, 2016). She was a cellmate and the girlfriend of Alice Sands, who was revealed in the previous episode, "Bomb Voyage," as an evil and psychotic mastermind who was targeting Jane Rizzoli.
Wendy was serving time for prostitution, but she was released two weeks before Alice was. At the beginning of the episode, Wendy was driven by her female lover to a general store in Maine, where Alice shot and killed a state trooper. A store clerk heard the gunshot, but he was knocked out with a bottle to the head by Wendy, who then stole the clerk's gun. Seeing that Alice drove off, Wendy escaped to a wooded area. Jane and her brother, Frankie, were at the scene after learning about the villainous couple being in the area; during their search, a gunshot was heard—which was later revealed to be Wendy shooting and killing a police dog.
Later on, the evil Wendy approached Jane from behind her and held her at gunpoint, but she was easily talked down by her hostage, who stated that Wendy would face a lot of trouble due to a state trooper being killed. Wendy was handcuffed and arrested, but Jane's attempts to tell her that Alice used her fell on deaf ears, as she insisted that her girlfriend loved her. She also let slip that Alice had a son, but refused to tell Jane who he was; after that, she was taken into custody.