RENO, Nevada — Authorities investigating four recent Nevada killings say murder charges are pending against a man suspected of being in the U.S. illegally.

Wilbur Martinez-Guzman, 19, was arrested Saturday in Carson City and is being held on possession of stolen property, burglary and immigration charges.

Authorities say they expect to file murder charges against him in the coming days in the shooting deaths of an elderly couple in Reno and two women in the community of Gardnerville Ranchos.

Carson City Sheriff Ken Furlong said at a Sunday news conference that federal immigration authorities told his office Martinez-Guzman had lived in Carson City about a year and was in the country illegally.

Furlong said Monday he didn’t know where Martinez-Guzman is originally from, and a message left with U.S. Immigration and Customs Enforcement was not immediately returned.

Authorities say Connie Koontz, 56, was found dead Jan. 10 in her home in Gardnerville Ranchos, about 15 miles south (24 kilometers) of Carson City. Three days later, 74-year-old Sophia Renken was found dead in her home about a mile from where Koontz lived.

On Wednesday, the bodies of 81-year-old Jerry David, and his 80-year-old wife, Sherri, were found in their home on the southern edge of Reno, about 20 miles (32 kilometers) north of Carson City.

Furlong said the investigation is ongoing and it’s too soon to comment on a possible motive. He said Martinez-Guzman didn’t yet have an attorney who could comment on his behalf.

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