In 1986, Lorenza Delgadillo Penguelly was charged with killing her 5-month-old daughter. Monday, she was arrested for attacking her mother with a knife.

Though convicted for killing her , Penguelly’s lawyers successfully argued that she was suffering from postpartum psychosis and she was sentenced to six years in prison. She was sent to San Bernardino County for psychiatric treatment.

But after being released from the facility and years of mental illness, Penguelly attacked her mother in what other members of the family are saying was an unprovoked attack.

While Elvira Delgadillo, 86, slept, her daughter came into her room with a knife and began stabbing her in the face, arms, and hands.

The daughter is being held without bail and it being charged with attempted murder for stabbing her mother in the face eight times, assault with a deadly weapon, and elder abuse.

As of Wednesday, Delgadillo was in the hospital, but is expected to recover.

Delgadillo’s niece said Penguelly, 51, is mentally ill and did not believe she should have been released from the mental hospitals she visited over the years.

After the birth of her first child in 1984, Penguelly suffered severe postpartum psychosis, a rare psychiatric disorder suffered by mothers that can prompt them to kill.

Read more here.