Girl, 16, Is Charged as an Adult in Fatal Stabbing of Uber Driver

Eliza Wasni, 16, has been charged as an adult with first-degree murder in the savage killing of Grant Nelson, 34.

An Illinois Uber driver was butchered to death this week and cops say a 16-year-old girl is the culprit.

Witnesses reportedly heard Grant Nelson screaming for help in the early morning darkness Tuesday in the Chicago suburb of Lincolnwood.

Watch: Why Woman With Internal Bleeding Used Uber Over Ambulance for Ride to Hospital

Before the 34-year-old died, he told responding officers that a female passenger had stabbed him in his gray 2015 Hyundai. Photos from the scene show the vehicle streaked in dried blood.

Nelson was transported to St. Francis Hospital, where he succumbed to his injuries several hours later.

According to a police report, 16-year-old Eliza Wasni, a girl they say matched the description provided by Nelson, was found behind a nearby building "in possession of two weapons believed to have been used in the commission of this offense."

Police said Wasni declined to give a statement at the time of her arrest.

The teen has since been charged with first degree murder, a charge that automatically transferred her to adult court.

Wasni was denied bond Wednesday in Cook County, where prosecutors have agreed she should be charged as an adult, calling the attack heinous and unprovoked, according to WLS.

Cook County prosecutors say Nelson was Wasni's third Uber driver Tuesday, and that he picked her up after she allegedly stole a knife and machete from a Walmart.

"Only two minutes or so after picking up the defendant, she begins to hack at him and stab him from the back of the seat," said Assistant State's Attorney Michelle Cunningham.

In a statement, Uber said "we are heartbroken by the loss of one of our partners, Grant Nelson. Our deepest sympathies and prayers are with his family and loved ones during this incredibly difficult time."

Watch: Woman: Uber Driver Dragged Me from the Car and Broke My Jaw

Uber's terms of service require that users of the ride share app be at least 18 years of age.

A service for Nelson is planned for noon Friday at Chicago Jewish Funerals in Skokie.

Watch: 'The Blind Side' Inspiration, Michael Oher, Cited for Assaulting Uber Driver: Cops