Investigators went to Hager's father's house Tuesday seeking consent to search the residence, which the father allowed. Investigators found the guns inside a shed in the back yard.
Hager was staying at the a friend's house on Opal Road when he was arrested.
In an unrelated incident, investigators are searching for Sisto Ernest Ramirez, 36, of Phoenix for possession of a stolen vehicle and providing false identification to a police officer.
Alvarez said on April 24 a deputy stopped Ramirez near Heber Street and 14th Street in Heber. The vehicle Ramirez was driving had been reported stolen in Phoenix on April 19 but the deputy was not aware of that because the system used to track stolen vehicles was down at the time.
Alvarez took custody of the vehicle anyway after Ramirez was unable to provide a valid driver's license and gave a false name.
Alvarez added Ramirez was arrested in Mesa, Ariz., on Monday by Indian tribal police for a misdemeanor but those officers didn't realize there was a warrant out for his arrest, so he was released again.
Wherever Ramirez is apprehended, Alvarez said, Imperial County authorities will seek to have him extradited to Imperial County to face charges of possession of stolen property and giving false identification.
"We are trying to establish more aggressive units in the investigations unit," said Alvarez. "We will be responding to current investigations and following on more information we are working on."
>> Staff Writer Mario Rentería can be reached at 337-3441.