Mom loses murder conviction in death of two-year-old daughter

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WHITE PLAINS – A 32-year-old former Mamaroneck woman who pled guilty to killing her two-year-old daughter on April 28, 2018, has lost the appeal of her conviction.

Cynthia Arce pled guilty in Westchester County Supreme Court in October 2019 to murder and two counts of attempted aggravated assault on a police officer.

Arce appealed her conviction contending that she had ineffective legal counsel and that her guilty plea was not knowing, voluntary, and intelligent.

Both arguments were rejected by the Appellate Division of State Supreme Court 

On the night of Gabriella Boyd’s death, police were called to 507 Chestnut Avenue by Arce, who said someone was dying. Officers found the child unresponsive in bed. She was transported to a hospital where her death was ruled a homicide.

Officers found Arce in an adjacent bedroom behind a closed door.  She had both hands behind her back and refused to comply with orders to show them.  When she finally showed both hands, she had large knives in them, charged at officers slashing at two of them. When the use of a stun gun failed to subdue her, a third officer shot and wounded her, ending the confrontation.