A 20-year-old North Dakota woman is being charged with negligent homicide after the car she allegedly was driving at 85 mph slammed into another vehicle, killing an 89-year-old Minnesota woman.

Prosecutors say the incident took place on May 27 in daylight on Interstate 29 outside Grand Forks, North Dakota. Police said Sletten was surfing photos on Facebook and texting before she plowed into a SUV, killing its front-seat passenger, Phyllis Gordon, 89.

"Sletten had also sent and received several text messages since she departed from Fargo," the complaint read, according to the Star-Tribune. Witnesses said the vehicle Gordon was traveling in had slowed to make an unauthorized U-turn before the collision. The criminal complaint said that "several people" unsuccessfully tried to revive Gordon at the scene.

The authorities alleged in the complaint that Sletten made no effort to brake, suggesting "the possibility that Sletten may have not seen the vehicle in front of her or that she was possibly distracted while driving." The victim had eight grandchildren and 17 great-grandchildren. North Dakota forbids using mobile phones while driving.