Catherine Kieu (born 1962 or 1963), also known as Catherine Kieu Becker, is an American woman who was convicted of torture and aggravated mayhem in 2013 for mutilating her husband's genitalia. The couple had been in the process of getting a divorce, but had continued to share their condominium. During the trial, the prosecution argued that Kieu assaulted her husband because he had re-established a relationship with an ex-girlfriend of his; the defense argued it was because of sexual and emotional abuse.