The suspect in the December shotgun slaying of a convenience store clerk will stand trial for first- degree murder.

Arapahoe County District Judge John L. Wheeler ruled Tuesday that the evidence against John Andrew Doubleday, 23, is sufficient to support the charges and set Doubleday's arraignment in the death of Jutte Burton Gallegos, 62, for April 30.

He is charged with first-degree murder, first-degree murder after deliberation and attempted robbery.

Doubleday, who is accused of killing the grandmother with a single shotgun blast in the back while she worked the graveyard shift at an Aurora 7-Eleven store on Dec. 10, has admitted he killed the clerk.

In a videotaped interview with police detectives made shortly after he was captured at a Colorado Springs motel 11 days after the shooting, Doubleday repeatedly tells police he is the man seen on a store surveillance leveling a sawed- off shotgun at Gallegos then firing as the store clerk tried to flee.

But Doubleday told the detectives during that interview that he planned only to rob the store and had no intention of killing anyone.

The suspect told police he and some acquaintances had been drinking at his apartment for several hours before the robbery and he was too drunk to recall much of what followed.