UPDATED: More Details Emerge In Murrieta Homicide Investigation Linked To Wildomar Teen

This story was updated at 10:40 p.m. July 17, 2013 to include more details.

The Riverside County District Attorney's Office announced Wednesday that a murder charge has been filed against a Murrieta man and a Wildomar teen has been charged with being an accessory to murder.

In a released statement from the DA's office, spokesman John Hall confirmed some details about the case. 

Charged with murder is Murrieta resident Kyle McLean, 21. He is the grandson of the missing 71-year-old woman, Catherine Sutton, who is presumed dead, although her body has not been found, Hall reported.

Wildomar resident Neil Erickson, 18, has been charged with being an accessory to murder.

Both suspects were arraigned today in the same courtroom at the same time, and both pleaded not guilty.

According to Hall, Sutton has been missing since July 11.

"Her daughter reported her missing to Murrieta police the evening of July 14, 2013, telling officers she had not seen or spoken to her mother for several days," Hall wrote in today's statement.

"At the time of this release, her body has not been located," Hall continued.

The investigation into Sutton's disappearance began Sunday around 10:17 p.m. when officers responded to a home in the 27000 block of Graystone Lane in Murrieta. It is believed McLean lived at the residence with his grandmother. 

Jail records show McLean was arrested June 24 in the same 27000 block of Graystone Lane on suspicion of felony and misdemeanor drug-related crimes. According to the jail records, he was released from custody and was due in court next month.

The decision to arrest McLean and Erickson in the Sutton case came Monday evening, after police worked through the night on the investigation.

"It was kind of a combined missing person, check-the-welfare call," Murrieta Police Lt. Tony Conrad said of the initial call that prompted Murrieta officers to visit the Graystone Lane home late Sunday.

According to The Press-Enterprise story, the court records also indicate that after that incident, the suspects bought two machetes at a Walmart and during the police investigation into Sutton's disappearance there were blood smears found inside the missing woman's home.

Erickson is being held at Southwest Detention Center in lieu of $500,000 bail; McLean is being held at the same facility in lieu of $1 million, jail records show.

McNeal is also facing a sentence-enhancing allegation of committing a felony while on bail. 

Both men are scheduled for another court appearance July 24. That proceeding will be a felony settlement conference—an informal discussion between the prosecution and the defense attorneys in front of a judge in which they exchange information and try to negotiate a resolution to the case—which comes before a preliminary hearing. --City News Service contributed to this report.