The incident happened on May 26, when Randolph's 2-year-old daughter, Juliet, and 1-year-old son, Cavanaugh, were found dead in a locked vehicle in the driveway of her home outside of Fort Worth, police said.
Randolph was charged Friday with two felony counts of first-degree injury to a child causing bodily injury.
Police were called to Randolph's home near Lake Weatherford, which is just west of Fort Worth, on May 26. Then she initially told authorities the children locked themselves in the auto. Her story changed in subsequent accounts and she implicated herself on Friday.
Randolph allegedly then went inside the house, smoked marijuana and fell asleep for two to three hours. Temperatures that day reached into the mid-90s.
Pictured, Parker County, Texas mother, Cynthia Marie Randolph and her two children, Cavanaugh Ramirez and Juliet Ramirez.
But she eventually admitted that she had found children playing in the vehicle at about 12:15 on that day.
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A Texas woman is facing charges after her two children died as a result of being locked in a hot vehicle. The children died after spending several hours in the auto.
After noticing the children were missing, she went searching for them and found them in the vehicle.
At the time Randolph stated the kids were exposed to the extreme temperature levels in the auto for "no greater than an hour".
In later interviews with Randolph, the sheriff's department said she "created several variations of the events which led to the death of her children", according to the Dallas Morning News. Investigators told the reporters the mother broke out the window to make it look like an accident.
It was close to 35 deg C that day and emergency crews pronounced the children dead at the scene. Randolph said the door was locked so she broke a window to gain entry. Her bond is set at $100,000, according to Parker County Jail records.
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