After reviewing all of the evidence in this case, following several searches of the suspect's home, his mother's home in Montebello and assorted locations, Homicide Investigators presented the facts to the Los Angeles County D.A.'s Office and obtained a murder filling against the suspect.
There have been no confirmed sightings of the 5-year-old since he and his father left Disneyland in the early morning hours of Disneyland on April 21.
Andressian Sr, in jail on $10 million bail, said that he took Andressian Jr.to Cachuma Lake Recreation Area one day after the boy was reportedly last seen. He's being held on a $10 million bail, ABCreports.
35, was arrested in Las Vegas and booked at the Las Vegas Metropolitan Police Department, according to a sheriff's news release.
The boy was last seen by his mother who had a video chat with him on April 18 as he visited with his father.
FILE - This undated photo provided by the South Pasadena, Calif., Police Department shows Aramazd Andressian Sr. Police previously said there was no evidence Andressian had been attacked.
But the department would give no further details on what that evidence was, whether the evidence came from the search at Andressian's or his mother's house, or what Andressian was doing in Nevada. His father was found unconscious that morning at a South Pasadena park, authorities said.
A day earlier, his auto had been spotted at Cachuma Lake - 120 miles northwest of Los Angeles - but surveillance footage subsequently showed he went there alone.
The father said he did not remember what happened to his child or any details that were useful in locating the boy, according to Mendoza, who said a prescription bottle was found inside Andressian's vehicle, which was doused with gasoline inside and out.
The Sheriff's Department has been mostly silent on the case since serving a search warrant at the home of Andressian Sr.'s mother almost a month ago.
"My son's disappearance is my worst nightmare", she said.
Surrounded by law enforcement, the boy's mom, Ana Estevez, made a plea at a news conference in May for her son's safe return. Police are offering a $20,000 reward for anyone with information about the case.