A 24-year-old woman is on trial in the first known case of a baby dying from fentanyl poisoning in Collin County.

Mary Locke took the stand during the punishment phase of her jury trial.

The jury convicted Locke on Friday of first-degree injury to a child for the fentanyl poisoning death of her 8-month-old daughter, Elizabeth, and will soon decide whether she should go to prison.

"She's scared because she doesn't know how the jury is going to perceive her," said Locke's defense attorney, Ryan Kreck.

Locke told jurors that she was panhandling at retail stores to support a drug addiction along with the child's father, who lived in an Allen apartment.

A police report said that on the evening Elizabeth died, "...they smoked 30 mg tablets of OXY with the goal of becoming intoxicated."

Loc

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