Police Use Silent, Giant Balloon in Pennsylvania Manhunt for Eric Frein

The Pennsylvania State Police have deployed a giant balloon to catch Eric Frein.

— -- Police are hoping they can finally outsmart the elusive suspect in the shooting death of a Pennsylvania state trooper with the use of a giant balloon.

The balloon is an "experimental device" in the area of the Alpine Ski resort in Henryville, the Pennsylvania State Police said today.

The balloon is tethered and unmanned, Kelly said. It can provide "similar levels of technology" as some of the police aviation equipment "at a fraction of the cost," he said, adding that it is silent, unlike the helicopters that have been used in the manhunt.

"As we stated before, we are utilizing many types of technology in this search for Eric Frein," Kelly said.

Frein is on the FBI's "Ten Most Wanted" list.

ABC News' Josh Haskell contributed to this report.