A man from the Netherlands has been sentenced in connection with an unmanned aircraft incident earlier this year in Yellowstone National Park.

Park officials say world-wide attention was drawn to the incident where an unmanned aircraft crashed into Grand Prismatic Spring the afternoon of August 2.

On Tuesday, Theodorus Van Vliet entered a guilty plea to violating the park ban against operating an unmanned aircraft. He was fined $1,000 and ordered to pay over $2,200 in restitution. The park has been unable to confirm the location of the unmanned aircraft, which remains somewhere on the floor of the iconic hot spring.

According to a news release, this is the second successful prosecution arising from a violation of the ban on use of unmanned aircraft in Yellowstone, an activity which is prohibited nationwide on all lands and waters administered by the National Park System.

Earlier this month, Andreas Meissner of Germany was sentenced to a one year ban from the park, was placed on one year of unsupervised probation, and was ordered to pay over $1,600 in fines and restitution in return for a guilty plea in connection with operating an unmanned aircraft which crashed into Yellowstone Lake near the West Thumb Marina back on July 18.

A third case is pending. Donald Criswell of Molalla, Oregon, has been charged with violating the ban after he flew his unmanned aircraft over the crowded Midway Geyser Basin and close to bison on August 19. His case is scheduled to be heard in federal court in Mammoth Hot Springs in October.

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