THEY WERE WATCHING Ryan beat up the Mexican crew leader on 16mm Commercial Ektachrome. Three of them in the basement room of the Holden County courthouse: the assistant county prosecutor, who had brought the film; a uniformed officer from the sheriff’s department operating the projector; and Mr. Walter Majestyk, the justice of the peace from Geneva Beach.

Right now they were watching Ryan holding the softball bat, bringing it up to his shoulder and not taking his eyes from Luis Camacho, who was beyond him on the screen, crouched and edging to the side but gradually, it seemed, closing in on Ryan.

“The guy’s doing a movie on migrant workers,” the assistant prosecutor said. “He happens to be there, he gets the whole thing.”

“There was a picture in the paper,” Mr. Majestyk said.

“The same guy. He ran out of movie film and started shooting with his Rollei.”

On the screen Ryan was moving with Camacho, following him closely; he seemed about to swing, starting to come through with it. Camacho lunged and pulled back; Ryan checked his swing and chopped, and the assistant prosecutor said, “Hold it there.”

The sheriff’s patrolman flicked a switch on the projector and the action on the screen stopped, slightly out of focus.

“Do you see a knife?”

“He’s behind him,” Mr. Majestyk said. “You can’t tell.”

The action continued, coming into focus: Camacho still edging, holding his left arm tight to his side, and Ryan moving with him. Ryan was raising the bat again, his hands coming back to his shoulder, and the assistant prosecutor said, “Right there. The one that broke his jaw.”

The stopped-action on the screen showed Ryan coming through with the bat, stepping with the swing, body twisting and arm muscles tight and straight and wrists turning as he laid the bat against the side of Luis Camacho’s face. The face did not resemble a human face but a wood-carved face, an Aztec doll face without eyes or before the eyes were painted in. Camacho’s wraparound hell-cat sunglasses were hanging in space but still hooked to one ear, and though the framing of the picture did not show his lower legs, Camacho seemed to be off the ground hunch-shouldered, suspended in air.