Police alleged that an Indiana teenager was speeding and on opiates when she caused a wreck that killed two sisters.

People reported that Alia Sierra, 17, is being charged as an adult on 10 felony counts, including reckless homicide, causing death while operating a motor vehicle with a controlled substance in the blood, and criminal recklessness. Sierra is accused of causing the July 12 crash that killed Haleigh Fullerton, 17, and Callie Fullerton, 8.

Deputies reportedly found Haleigh and Callie underneath the Honda Accord that had driven through their Clinton County home. The girls’ mother was transported to the hospital with a life-threatening injury. WANE reported that she is currently in stable condition.

Four teens were in the car with Sierra at the time of the crash. The front passenger supposedly told detectives that he asked Sierra to slow down moments before they hit a bump that led them into the home, according to WRTV.

After veering off the road, the car reportedly went through a ditch and field before crashing into the Fullerton residence.

The affidavit also stated that another passenger claimed that Sierra called her car “the beast” and bragged about how fast it can go.

Emerging court documents revealed that the 17-year-old was possibly speeding before veering off the road. Detectives reportedly used the “Critical Speed Formula” to determine Sierra was driving at least 107 miles per hour before losing control.

A urine test revealed that Sierra tested positive for opiates, the local station also reported.

The Indiana teen’s next court date is scheduled for October.

[Featured Image: Clinton County Sheriff’s Department/GoFundMe]