AVALANCHE CENTER WILL TESTIFY IN CRIMINAL CASE AGAINST SUMMIT COUNTY SNOWBOARDERS AS JUDGE REJECTS “CHILLING EFFECT” ARGUMENT ~ The Colorado Sun

Colorado Attorney General argued that making Ethan Greene an expert witness for the prosecution of backcountry travelers would stop others from providing information about avalanches.

Jason Blevins

Mar 17, 2021

Two snowboarders are facing charges of reckless endangerment and restitution to replace a damaged avalanche mitigation system following a March 2020 avalanche above Interstate 70. (Provided by the Colorado Avalanche Information Center)


A Summit County judge has rejected the Colorado Attorney General’s argument that forcing the boss of the Colorado Avalanche Information Center to testify in a rare criminal case could have a chilling effect on the way backcountry travelers share avalanche observations with the agency.

“I would really hope that the chilling effect that is being discussed here does not happen because, frankly, all you are doing by withholding that information is making it less safe for you, your colleagues and … other backcountry users,” Judge Ed Casias said Tuesday afternoon. “So the chilling effect component of it, the court does not really see as being a major, major issue here.”

Attorney General Phil Weiser did not want avalanche center director Ethan Greene to testify in the case against backcountry snowboarders Evan Hannibal and Tyler DeWitt, who are facing charges of reckless endangerment and $168,000 in restitution stemming from a March 2020 avalanche above Interstate 70. The avalanche, captured on their helmet cam video, did not injure anyone, but it did destroy an avalanche mitigation device and bury a service road.

Weiser feared that forcing Greene to testify in the prosecution of backcountry travelers would hinder the ability of the avalanche forecasting organization to gather information from backcountry users. 

“The agency’s concern is based on decades of experience with staff in frequent communication with backcountry travelers,” Deputy Colorado Attorney General Jeff Fugate argued Tuesday in a hearing on the motion to quash the prosecution’s subpoena for Greene’s testimony. “This community involvement and this information sharing really is fragile and there is real potential to damage the public trust.”

Deputy District Attorney Stephanie Cava was critical of the “speculative nature of the concern” about the chilling effect. She said her office prosecuted an avalanche case in 2014 involving backcountry travelers outside Keystone ski area and there was no decrease in avalanche reporting. In fact, she said, the agency is fielding a record-high number of avalanche observations from backcountry travelers this season. Cava suggested the increase might have to do with press coverage of the case.

“There have been no studies that I know of showing that criminal actions impact avalanche reporting,” Cava said. “If this court were to grant this and give every witness that doesn’t want to testify an out, it sets a great precedent. It would be something where more and more witnesses would say ‘I don’t want to testify.’ And how are the people going to be able to prove charges going forward if that’s allowed?”

What began as a small slide of a few inches of fresh snow stepped down to a weak layer and ultimately scoured the ground in the March 25 avalanche involving two snowboarders who are facing charges of reckless endangerment and fines to replace a damaged avalanche mitigation system. (Provided by the Colorado Avalanche Information Center)

Prosecutors filed a motion objecting to the expert witness recruited by Hannibal and DeWitt, avalanche educator Jon Miller, who has promoted avalanche safety across the West for decades. She also suggested her team could use more time to fully vet Miller and prepare questions for the trial, which is set to begin next week. 

Jason Flores Williams, the attorney for Hannibal and DeWitt, argued against a continuation. 

“What this complaint represents to them is essentially a financial end to their life,” Flores Williams said, pointing to the prosecution seeking $168,000 to pay for an avalanche mitigation system that was destroyed in the avalanche. 

In a rare instance of a prosecutor openly talking about plea negotiations, Cava said Hannibal and DeWitt declined a deal to plead guilty to a lesser misdemeanor, pay a fine of $25,000 and serve volunteer hours in the community.

Flores Williams said Casias has issued “extremely thoughtful” rulings in the case and was very happy he allowed Miller to testify as the defense’s expert witness. 

“It was critical for these guys to be able to rebut whatever expert testimony is offered by the prosecution and be able to offer our own expert to be able to counter their testimony,” he said. “This was a critical win for us today.”

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