Law & Order: Special Victims Unit (1999)

S6E12 Identity

The investigation takes a twist when a gang member from the Stone Cold Assassins plummets from a building after the victim he attempted to assault bites him in self-defense. Things get complicated when the victim's twin sister confesses to the crime, a claim that seems implausible given the evidence. However, everything shifts when the hidden truths about the sister's real genetic background come to light, complicating the case further.