State Troopers arrested a Baton Rouge man Monday on counts of vehicular homicide and driving while intoxicated in the one-vehicle crash July 7 that killed 35-year-old Tasha Gross.

An investigation into the crash revealed conclusive evidence that Marcus Castille, 42, was driving the 2005 Chevrolet Avalanche on Blackwater Road when it began to flip for unknown reasons and continued to overturn until it landed on its roof in a private driveway, said State Police spokesman Bryan Lee.

Gross and Castille were both unrestrained and Gross was ejected from the vehicle and received fatal injuries. She was pronounced dead at the scene by the East Baton Rouge Parish Coroner’s Office.

Castille was partially ejected from the vehicle and was taken to Our Lady of the Lake Hospital with serious injuries.

It was originally unclear whether Gross or Castille was the driver in the crash.

Troopers conducted an investigation and presented their findings July 12 to a 19th Judicial District judge, who determined there was sufficient evidence to prove Castille was operating the vehicle, Lee said.

Upon his release from the hospital, Castille will be booked into Parish Prison on counts of vehicular homicide, first-offense DWI, reckless operation, no driver’s license, altered temporary tag, altered motor vehicle inspection, failure to register vehicle and no insurance.