Authorities converged on Arroyo Park in South Pasadena Thursday morning in the ongoing search for 5-year-old Aramazd Andressian Jr., who disappeared in April after a trip to Disneyland with his father.
The new search comes the day after Ana Estevez, Aramazd's mother, made a tearful plea for help finding her son.
Aramazd Andressian Sr. and his son are seen in a family photo.
The dad was found passed out in a South Pasadena park Saturday, the same day the boy's mother reported him missing.
Detectives revealed Wednesday that the father acknowledged taking prescription pills and was found in a auto doused with gasoline, alongside a pack of matches.
In April, Aramazd Andressian Sr. failed to show up to a prearranged meeting site to return the boy to his mother.More news: Nashville Predators vs. Anaheim Ducks - 5/16/17 NHL Pick, Odds, and Prediction
In a briefing at the park this morning, sheriff's Lt. Joe Mendoza told reporters that the search was being conducted because investigators received a recent tip that was regarded as "credible", but he declined to be more specific. "I can only speculate that I must have been attacked in the park, given my unresponsive state and subsequent physical condition".
Mendoza said a gas can and matches were also found in the auto.
South Pasadena police were searching alongside sheriff's deputies, using search dogs and a drone to try and find any clues.
Andressian Sr. told detectives that he had taken his son to Lake Cachuma in Santa Barbara County the previous day, but detectives have not been able to find evidence the boy was ever at the lake.
South Pasadena Police Chief Arthur Miller said the father has gone underground and not provided information.
It's been a month since Aramazd Andressian Jr. vanished.More news: Mourinho sweating over Fellaini injury after Southampton draw
"He had several minor injuries but we don't know if (the injuries) are self-inflicted", Mendoza said.
The Los Angeles County Sheriff's Department executed a search warrant on April 28 at Andressian's home in South Pasadena.
About 80 members of the Los Angeles County Sheriff's Department and South Pasadena Police Department were involved in the search operation, which began about 6 a.m.at the park located at 800 Stoney Drive, a news release from the Sheriff's Department stated.
Mendoza said Andressian Sr. remains a person of interest.
Authorities search a brush area of Arroyo Park on May 18, 2017. He was last seen wearing a plaid shirt and plaid shorts and has a small mole on the bottom of his right shoulder.More news: "ShadowBrokers" threatens to release more cyber attack tools
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