Obdulia Sanchez was driving the vehicle while live streaming to her Instagram account. The footage shows the teen from Stockholm driving the car before it crashes and rolls over a fence and into a field.
Obdulia keeps the camera recording in the aftermath of the crash and can be heard saying: "Jacqueline, please wake up. I f****** killed my sister, OK? I know I'm going to jail for life," The Daily Mail reports.
"I love my sister… this is the last thing I thought was going to happen to us."
"I killed my sister, but I don't care. I killed my sister. I know I'm going to prison, but I don't care. I'm sorry baby. I'm a hold it down."
The disturbing clip ends with her kneeling next to her dead sister and saying: "Wake up baby, I'm f**king sorry baby, I did not mean to kill you sweetie."
Authorities believe Jacqueline was not wearing a seatbelt when the car crashed at about 6.45pm on Friday, 7News reports.
The 14-year-old was thrown through the back window of the car.
Another girl, who police have not named but have confirmed as a minor, was also not wearing a seatbelt and suffered major leg injuries in the crash.
This article first published on Marie Claire.