Law & Order S16E07 - House of Cards

Fontana and Green investigate when the body of a young mother who had recently cleaned up her life is found in her apartment, with her five-day-old infant son Nicholas missing. Detectives soon track down Arlene Tarrington and ascertain that the infant she is claiming is hers is really baby Nicholas, but after her lawyers make a claim of post-partum psychosis and another man comes forward claiming to be the child's father, McCoy and Borgia are forced to decide which of the two they would rather lock up for the crime.