The incident happened on May 26, when her 2-year-old daughter, and 1-year-old son were found dead in a locked vehicle in the driveway of her home.
Today, Tribune Media Wire reports that Randolph has been charged with "first-degree felony counts of injury to a child causing serious bodily injury".
According to WFAA, Randolph created "several variations of the events" during police interviews and later said she broke the auto window to make this look like an accident. Apparently, after returning from a trip in the vehicle, Juliet refused to get out, prompting the mother to shut the 2-year-old and her younger brother in the hot auto alone as a form of "punishment".
Randolph then told investigators she went into her home, smoked marijuana and went to sleep for two to three hours.
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"Please send a thank you to [the] Parker County Sheriff's Office and the Texas Rangers from the Ramirez family", the statement said.
According to police statements, Randolph broke the window before police arrived to make the deaths look like an accident. The website noheatstroke.org says humans enter heat stroke - a potentially fatal condition - at 104 degrees. Authorities say that the suspect admitted to locking the toddlers inside her vehicle on objective to teach them a lesson. According to the data, an average of 37 children die in hot cars annually in the United States. She said when she observed they were not there, she went searching for them and found them about a half-hour later locked in the auto. Randolph said she had been folding laundry and watching television in her rural home west of Fort Worth while the two played in a back porch.
Both were pronounced dead at about 4:30pm local time (10:30pm BST) on 26 May. She said that she broke the window in an attempt to rescue her children and called 911.
No bond has been set yet for Randolph, and it is not clear whether she has an attorney.