Prosecutors said Catherine Kieu, 50, carefully planned out the July 11, 2011, attack. She drugged her husband following an argument after he filed for divorce. Screaming, "You deserve it," she cut off his penis with a 10-inch kitchen knife and tossed it down a garbage disposal, prosecutors said.
During trial, the 60-year-old victim testified that his penis could not be reattached and that he felt as though he had been murdered.
Public defender Frank Bittar said Kieu had been subjected to verbal and sexual abuse by the victim. He had also argued that Kieu had mental health problems caused by a childhood full of molestation and other trauma in war-torn Vietnam.
Kieu faces a maximum sentence of life in state prison with the possibility of parole when she is sentenced on June 28.
City News Service contributed to this report.