A Texas grand jury has indicted a teen on two counts of murder for the deaths of  two toddler sisters who he allegedly left in a hot car last year.

Indicted on July 23, Kevin Franke, 18, was initially charged with two counts of manslaughter, injury to a child and child endangerment for the June 7, 2017, deaths of Addyson Overgard-Eddy, 2, and Brynn Hawkins, 1. Authorities believe Franke, who was 16 at the time, spent the night with the two babies in an SUV and left the girls in the car until noon the following day, according to the San Antonio Express-News.

As CrimeOnline previously reported, mother Amanda Hawkins, now 20, is also accused of intentionally leaving her two young daughters in the car as she partied at Franke’s home. Franke is believed to have slept in the car that night because there wasn’t space in the home—ignoring the girls in the backseat.

The murder indictment obtained by the newspaper alleged that Franke rolled up the windows and turned off the car as he exited the car the morning of June 7. Franke is accused of also endangering the toddlers by failing to take them to the emergency room.

READ More: ‘Mom’ leaves two tots to die in hot car in Texas heat

Police alleged that the mother told partygoers, “they’ll cry themselves to sleep,” when they suggested she bring her daughters inside. In turn, the toddlers reportedly remained strapped into their car seats for at least 15 hours before they succumbed to extreme temperatures inside the vehicle.

KSAT reported that Amanda took the girls to the hospital and claimed that the pair collapsed while smelling flowers at Flat Rock Lake. She remains jailed on two counts of injury to a child and two counts of child endangerment, according to the Express-News.

KSAT noted that mother-of-two grabbed headlines in April for an alleged relationship she had with a Kerr County corrections officer. The Daily Times wrote that Corporal Christopher Berge had a non-sexual relationship with the inmate which entailed them calling one another and sending notes. Barge reportedly gave her a ring at one point during the three-week relationship.

[Featured Image: Addyson Overgard-Eddy, Brynn Hawkins/Facebook/Handout]