Dale S. Hausner told reporters at a Maricopa County jail that fellow suspect Samuel John Dieteman could have taken Hausner's car while Hausner was sleeping. Police said several of the shootings were done from a car.

"I don't see Sam as a cold-blooded killer but if they've got evidence saying he is, there's not much I can do to refute that," Hausner said.

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Hausner said he never shot anyone and that he was only keeping news clippings about the shooting spree and a map of shooting locations because he found the case interesting. Police found the maps and clippings while searching the men's apartment during their arrest last week.

Hausner said he suffered through the deaths of two sons and would "never want anyone to go through what I went through."

The two men have each been booked for investigation of two counts of first-degree murder and 13 counts of attempted first-degree murder. They are being investigated in about three dozen incidents in all.

On Monday, police said they are adding one more fatal shooting to the string of attacks under the "Serial Shooter" investigation.

So far, Phoenix police spokesman Sgt. Andy Hill said the May 17, 2005, killing of Tony Mendez has not been connected to Hausner or Dieteman.

The entire Serial Shooter investigation now includes the killings of seven people and the wounding of 17. Other shootings in the case involved animals.

If the shooting of Mendez is connected to the Serial Shooter case, that would make him the first victim. Previously, police believed the first victim was 56-year-old Reginald Remillard, who was fatally shot while sleeping at a bus stop.

The arrests are expected to free up about 50 officers to help track down another shooter, dubbed the Baseline Killer, who is believed responsible for eight killings, some in the area off Baseline Road.

Investigators had started looking for Dieteman in July as a suspect in arson fires in June at two Wal-Marts in suburban Glendale. They found out where he lived and kept him and his roommate under surveillance for most of the week.

Thursday night, police decided they had enough to make the arrests in connection with the Serial Shooter attacks. Authorities said their evidence against the men included weapons and the map.

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