ALFRED — The third day of Patrick Dapolito’s murder trial got under way this morning with testimony from a state police detective and a recording of the defendant reenacting the fatal shooting of his wife.

Dapolito, 41, of Limington, is on trial in York County Superior Court for the 2010 slaying of his wife, 30-year-old Kelly Winslow.

Dapolito initially told authorities that they had been sleeping on the bathroom floor with a gun in his right hand. He had said that he woke up to the sound of gunfire and found his wife dead.

The defense is now presenting Winslow as the victim of a dispute between Dapolito, who had taken up drug dealing, and his suppliers. On the morning of Winslow’s slaying, according to the defense, Dapolito had left their home in Limington to get coffee and cigarettes from a store and found Winslow dead when he returned.

This morning, the prosecution presented a recording of Dapolito and detectives in his home. Dapolito was showing them where the shooting took place as well as the basement room where he had placed Winslow’s body before moving it to his father’s property in Upton.

In the recording, Dapolito used a life-sized mannequin to show detectives the approximate locations of his and Winslow’s bodies when they went to sleep and after the gun fired.

On the recording, Dapolito indicated that they had been lying on the floor alongside the vanity. They had gone to sleep with Dapolito spooning Winslow and with Dapolito holding the gun in his right hand under his head. They had a pillow over their heads, apparently because the light was bothering Winslow.

Dapolito said he woke up to a “pouf” sound and jumped up.