The Park County, Wyo., Sheriff's Office has called off rescue attempts for two brothers whose plane went down in the Washakie Wilderness area of Park County on May 6.
Robert L. Zimmerman and his brother, Ward H. Zimmerman, are both presumed dead and efforts to recover their bodies will be held off until conditions improve, said Lance Mathess, Park County Sheriff's Office spokesperson.
Several rescue aircraft have attempted to reach the wreckage and rescue teams have tried to hike in, but the fear of avalanche conditions directly above the wreckage have made the plane too dangerous to access, Mathess said.
The family of the brothers reported them missing Saturday, and the Park County Sheriff's Office said the plane was found Monday morning on a rugged, snowy mountain just outside Yellowstone National Park.
In Mathess' press release, he says Sheriff Scott Steward made the decision to presume the two had perished in the crash.
The family has agreed to call off the rescue, Park County Search and Rescue Commander Martin Knapp said.
“After reviewing the conditions at the site of the wreckage and taking into account my years of experience in avalanche evaluation and mitigation, I simply could not in good conscience risk any more lives,” Knapp said in a press release.