A 1-month-old Hudson Valley baby lost her mother and grandmother "due to the barbaric actions" of a man with "a wanton disregard for human life."

On Tuesday, Rockland County District Attorney Tom Walsh confirmed a Rockland County man was sentenced for murdering two people in Valley Cottage, New York

Hillcrest, New York Man Sentenced For Murdering Two in Rockland County, New York


Robert C. Williams III, 34 of Hillcrest, New York was sentenced to life in prison without the possibility of parole after being found guilty on all charges by a Rockland County Jury stemming from a 2020 double homicide in Valley Cottage, New York.

“The events that unfolded on May 26, 2020, left the residents of Valley Cottage and Clarkstown in shock and anger. This senseless act of extreme violence was avoidable and resulted in a complete tragedy. " District Attorney Walsh stated.

In April, a Rockland County Jury deliberated for two days before rendering a guilty verdict on all charges.


Williams III was found guilty of the following charges:

  • Murder 1st
  • Murder 2nd (2 counts)
  • Criminal Possession of a Weapon 2nd
  • Criminal Contempt 1st (2 counts)

Valley Cottage, New York Mother, Grandmother Murdered

On May 26, 2020, Williams was in possession of a loaded .40 Caliber firearm when he entered a home at 104 Lake Road in Valley Cottage, New York and proceeded to shoot and kill two people inside the home.


Williams fatally shot 27-year-old Kathleen Castor and 63-year-old Wanda Castor. Williams and Kathleen were previously in a relationship. Wanda is Kathleen's mother.

“The murders of Wanda and Kathleen Castor was a wanton disregard for human life. I appreciate all those who worked to bring justice to the Castor family," Clarkstown Police Chief Jeffery Wanamaker said.

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At the time of the double homicide, an active duly served Order of Protection was in place for Kathleen Castor, officials say. Kathleen’s newborn baby, a 1-month-old, was left in the apartment alive and unharmed.

"On May 26, 2020, one-month-old Anastasia lost both her mother and grandmother due to the barbaric actions of the defendant. We hope that with Williams's sentencing the Clarkstown community and the Castor family can begin the healing process," Walsh added.

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