Police captures prison escapee who plotted to kidnap David Letterman's son

An escaped inmate once accused of plotting to kidnap talk-show host David Letterman's son was detained Wednesday, but a man who fled a prison farm with him was still on the loose.

Kelly A. Frank was arrested along a highway in northwestern Montana, Lake County Sheriff Lucky Larson said.

Frank, 45, and William J. Willcutt, 22, escaped Friday from a ranch operated by the Montana State Prison.

The search for them moved about 120 miles (193 kilometers) south Tuesday after a vehicle found abandoned in the woods was traced to an area near the ranch. The car's owner said his house had been burglarized, and three weapons were missing.

Authorities said the men were considered armed and dangerous.