JACKSON, Wyo. (AP) – A teenager has been charged with negligent homicide for colliding on his snowboard with a skier at Jackson Hole Mountain Resort a year ago.

Greg Doda, 17, of Crownsville, Md., ran into Heather Donahue, 29, of Shrewsbury, Mass., in the Laramie Bowl last February, according to court documents.

“The impact knocked Donahue out of her gloves, skis, poles, hat, goggles, neck warmer and catapulted her 25 feet down the hill,” sheriff’s investigator Mike Carlson said.

Carlson said Doda, who was 16 at the time, was going 35-60 mph when he struck Donahue. Though Doda was wearing a helmet, Donahue was not and died of a head injury.

He said investigators were able to review a video of the collision.