Yellowstone catches trespassers at Stephens Creek bison facility

JACKSON HOLE, WYO – Three individuals were arrested yesterday in connection with criminal activity at the Stephens Creek bison capture facility in Yellowstone National Park.

Cody J. Cyson, of Minnetonka, Minnesota and Thomas L. Brown of East Hardwick, Vermont, were each charged with one count of entering a closed area and one count of interference with an agency function in Yellowstone National Park on March 7, 2018.

Both individuals were contacted by park law enforcement in the Stephens Creek Administrative Facility on March 6, 2018 just after 5:00am. Cyson and Brown has used a steel tube and chain to secure themselves to the squeeze chute in order to disrupt the shipping of the buffalo in the pens.

In a separate incident, Hanna F. Ponder, of Donnelly, Idaho, was charged on March 7, 2018, with one count of entering a closed area in Yellowstone National Park. Ponder was located by law enforcement in the bison closure of the Reese Creek drainage area during the morning hours of March 6, 2018. Ponder stated she had been walking the creek looking at birds.

All three individuals made their initial appearance today in US District Court where the government made a motion for detention of the individuals and a bond hearing is scheduled for March 12 at 10:30am.

It is the third incident at Stephens Creek in the last seven weeks. Yellowstone credits the arrests yesterday to increased surveillance and security measures now in place at the facility.

“This was another attempt to disrupt bison operations. Park staff resumed work immediately following the incident,” the park said in a press release.

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