INDIANAPOLIS — A serious crash on an interstate ramp known as the South Split left a man in critical condition; a nurse rushed into action  calling 911 operators and performing CPR on the victim until help arrived.

At approximately 7:30 p.m. Saturday, emergency responders were notified of the crash in an area known as the South Split on I-65 southbound near the I-70 interchange.

A passerby, who was a trained nurse, relayed information to 911 operators and performed CPR on the crash victim until emergency crews arrived.

Upon arrival, State Police Troopers and the Indianapolis Fire Department rendered medical care but despite life-saving attempts, the male crash victim was pronounced dead at the scene.

The remains of the deceased male were recovered by the Marion County Coroner’s Office.

The victim was identified as 44-year-old David Lopez of Oswego, Illinois.

Lopez was driving a 2006 Ford pick-up truck which had left the roadway on the ramp from southbound I-65/I-70 to southbound I-65 and struck a guardrail. Lopez was ejected from the vehicle, according to a preliminary investigation.

Witnesses told officials the motorist was weaving all over the roadway before the crash.

The driver was not wearing a seatbelt and alcohol is believed to be a possible factor in the crash, authorities say.

I-65 southbound was closed for approximately two hours to allow for a crash investigation and removal of the wreckage.