Police are investigating a deadly shooting inside an RV parked outside a Wal-Mart store in Cedar City.

Police said about 9:47 p.m. Tuesday, a man had knocked on the door of an RV that was parked overnight in the store parking lot. A family of four from Cane Coral, Fla., was inside.

Investigators said the man forced his way into the motor home.

"The tourists inside were in fear for their life," Sgt. Jerry Womack told the Deseret Morning News on Wednesday. "There was a scuffle inside the motor home and the man shot (the intruder) in the head with a shotgun."

On Wednesday, detectives were questioning the family, who had been traveling through the area and stopped for the night.

Womack said detectives were looking into whether alcohol was involved in the confrontation.

"We believe he (the shooting victim) might have been intoxicated," he said. An autopsy was being performed on Wednesday.

Police identified the dead man as Steven Stubbs, 26, of Cedar City.

Stubbs has been convicted of speeding, alcohol violations and interfering with a police arrest, according to records in Cedar City's 5th District Court.

The Cedar City Police Department said Wednesday it was investigating if the use of deadly force is justified. The Iron County Attorney is expected to make a final determination.

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E-mail: bwinslow@desnews.com