CHARLACK, Mo. (CBS Local) — A Missouri mother is accused of overdosing on fentanyl in a convenience store bathroom, leaving her 5-year-old son locked inside her car.

Anastasia Trinidad, 24, was found slumped over in a stall Thursday evening at a 7-Eleven store in Charlack, showing signs of a heroin or fentanyl overdose, according to a spokesman for the St. Ann Police Department.

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An officer administered Narcan and Trinidad came to and immediately began asking, “Where’s my boy?” Police found the boy in her car outside, KTVI reported.

“[He] was in the backseat crying. Further investigation showed it was upwards of 30 minutes she was in that bathroom and left her 5-year-old son unattended in the car. The windows were up,” said St. Ann Police Commander Jeffrey Tesdall.

“Unfortunately, a 5-year-old child that’s uninvolved in this, you know it’s not his fault for mom taking that, but like you say, he could have been a victim of a homicide,” Tesdall added. “It’s tragic. It’s a shame.”

Trinidad, who resides in Florissant, was charged with endangering the welfare of a child and was jailed with bond set at $200,000 cash-only.

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Her son was placed in the care of his grandmother.