MOUNT VERNON, Ky. (AP) _ A man who refused to let police cut down his marijuana plants was shot to death after a daylong standoff, authorities said.

The standoff with Gary Shepherd, 45, began Sunday after members of the Governor's Marijuana Task Force conducting an aerial search spotted about 55 plants in the back yard of a home near Mount Vernon.

Troopers landed a helicopter and told Shepherd they were going to cut down the plants, said Trooper Gilbert Acciardo, a state police spokesman. Shepherd went into his home and came out with a rifle, Acciardo said.

A special-response team showed up and found Shepherd sitting in a lawn chair holding the rifle.

''He was pretty much sitting there, probably about six or seven hours,'' said Rockcastle County Deputy Sheriff Darrell Doan. ''He didn't talk to us at all.''

Shepherd was shot several times in the head and chest as he raised his rifle toward the troopers, authorities said.