BRADFORD — A northwestern Pennsylvania man has pleaded guilty to conspiring to cause an oil spill in the Allegheny National Forest because he was upset with his former employer.

Forty-three-year-old Andrew Horton of Bradford acknowledges dropping off his son, 22-year-old Christopher Horton, to vandalize the company's oil storage tanks in August.

McKean County prosecutors say Horton's son opened tank valves spilling 46,000 gallons of oil, fouling a nearby stream and killing fish and other wildlife.

Andrew Horton, an avid fisherman, says he cried when he learned of the extent of the damage. Horton's attorney says his client didn't realize how much the environment would be harmed.

Andrew Horton will be sentenced July 1. His son is awaiting trial.

By The Associated Press