RENO, Nev. (AP) — Nevada prosecutors have announced their plans for the prosecution of a 19-year-old El Salvadoran immigrant identified as the prime suspect in four killings.

Washoe County is officially moving forward in the prosecution of Wilber Ernesto Martinez-Guzman.

The Washoe and Douglas County District Attorney's have filed a single formal criminal complaint against Martinez-Guzman, which was submitted to the Reno court today before the press conference.

He will be held on four counts of murder with use of a deadly weapon and five counts of burglary.

Martinez-Guzman will be transferred to Washoe County, and held without bail.

Washoe County District Attorney Chris Hicks noted that he will personally be prosecuting.

Upon receiving questions, DA Hicks responded as follows:

"It is too early to determine anything having to do with the death penalty at this time."

"As far as we are concerned, the legal status of his citizenship is not the primary concern in this prosecution. We are trying a murderer."

"Martinez-Guzman has not yet been appointed public legal counsel in Washoe County."

On January 13, DSCO detectives applied for and obtained a search warrant in regards to Ms. Koontz's stolen Apple Watch. They found that following the murder of Ms. Koontz, someone had tried to use the watch with an Apple account that was not associated with the deceased. Detectives were able to determine that the account attempting to access the watch belonged to Sonia Guzman of Carson City, NV -- the defendants mother.

Wilber Ernesto Martinez-Guzman has been jailed since his arrest more than a week ago. He was charged Thursday with possessing weapons and selling jewelry belonging to several victims.

Authorities have said Martinez-Guzman was in the U.S. illegally.

A sheriff's investigative report obtained by The Associated Press says Martinez-Guzman admitted killing a Reno couple, using a handgun he said he stole earlier from their home.

The report filed with a judge says the gun is also believed to have been used to kill two women in the town of Gardnerville.