A Cedar Rapids woman faces four counts of vehicular homicide for a September 2017 crash that killed two people.

According to the criminal complaint obtained by KCRG-TV9, investigators says Stastny was under the influence of marijuana at the time of the crash.

The court documents say Stastny was also attempting to pass a car and a bus while travelling at 81 m.p.h. when the crash occurred. Accident reconstruction experts say there was no evidence she attempted to apply the brakes on her vehicle.

Investigators say a blood test showed the presence of THC and THC metabolites in Stastny's system. THC is a compound found in the cannabis plant. They also say they found marijuana and drug paraphernalia in the her purse.

Documents show Stastny admitted to being a frequent marijuana user and said it was possible she smoked marijuana prior to driving that night. Investigators say test results indicate the amount of THC in her system was consistent with smoking the drug around the time of the crash.

The Linn County Attorney's Office says two counts of Vehicular Homicide are for driving recklessly and causing the deaths of Moore and Moander and the other two are for driving while impaired and causing the deaths of Moore and Moander.

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A woman has been charged almost a year after a late night car accident left two dead in Cedar Rapids.

Four charges of Homicide or Injury by Vehicle (Accidental) have been filed against Brianna Stastny after a crash on September 29, 2017.

Authorities said 22-year-old Stastny of Cedar Rapids was driving south on Highway 151 around 11:30 p.m.

Documents say Stastny tried to pass a car in front of her near the Wright Brothers Boulevard intersection when her vehicle was hit by another vehicle heading north.

The passenger in Stastny's car, 22-year-old Kaelonnie Moore from Cedar Rapids was pronounced dead at the scene.

The driver and only person in the of the car that was headed northbound, 43-year-old Darla Moander from Cedar Rapids, was also pronounced dead at the scene.

After the crash, Stastny was taken to the University of Iowa Hospital and Clinics with non-life threatening injuries.

Stastny was arrested Sunday and is being held in the Linn County Jail.