A 55-year-old former nanny was found guilty Wednesday of murdering two young children in her care on New York City's Upper West Side.

Yoselyn Ortega was charged in the deaths of Lulu, 6, and Leo Krim, 2, on Oct. 25, 2012.

Jurors had listened for weeks to grim testimony about the violent killings of the children. Their mother had returned home from swimming lessons with their 3-year-old sister, only to find the two dead in a bathtub.

As the verdicts were read, father Kevin Krim broke down in tears. Ortega sat expressionless at the defense table.

Prosecutors had described how Ortega was supposed to bring Lulu to the dance class, but instead brought her and Leo to their apartment. There, she used two kitchen knives to slash them to death. Then she placed them in the tub, authorities said.

When Marina Kim arrived home, Ortega had sliced her own wrists and plunged a knife into her throat. 

The six-woman, six-man jury rejected her defense team's contention that Ortega was mentally unfit and was in a "psychotic" and "dissociative" state when she attacked the children.

Ortega claimed to hear the voice of the devil and was following his instructions.

RELATED STORIES

Mother Comes Face to Face With Nanny Accused of Killing Her Children: 'You're Disgusting'

Hero Nanny Rushes Boy to Safety as She Encounters Burglar in Home

Meet the Stunning Nanny at the Center of Mel B's Infidelity Claims