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AMADOR COUNTY, Calif. (KTXL) — The Amador County Sheriff’s Office announced Sunday that they believe a girl who disappeared in 2019 was murdered. 

According to the sheriff’s office, 22-year-old Joshua Anthony Martinez was arrested Friday on suspicion of felony murder. 

Family of Victoria Marquina, the girl missing from Amador County, said in an interview in July that she disappeared just before her 17th birthday in October 2019.  

Blanca Valencia told authorities that her daughter, Marquina, had started talking to a 21-year-old man, who was later identified as Martinez. 

The sheriff’s office said Martinez admitted to dropping Marquina off in Sutter Creek after a concert in 2019 and added that he later stopped showing up to his job. 

He was later arrested in June in Los Angeles for several charges related to sex with a minor, according to the sheriff’s office. Those charges were dropped because Marquina is still missing.

Detectives believe Marquina was pregnant with Martinez’s child.

Although they have yet to find Marquina, Undersheriff Gary Redman told the Ledger Dispatch that they are “certain Victoria Marquina was killed by Martinez.” 

They also believe he had help. 

“I am positive, 100%, those guys know what happened to my daughter,” Valencia said.

However, Martinez was released from jail Monday due to a lack of evidence.

“We have no victim at this point, so the district attorney’s office can’t proceed with a case when we’ve got no victim,” an official with the sheriff’s office told FOX40.

“And I feel like I was just, you know, set up, whatever,” Martinez told FOX40 after being released. “You can check my background, I have a clean record. I’ve never done anything, I’ve never fought.”

Martinez maintains he is innocent of both charges, and said his relationship with Marquina never turned physical.

“I met her on a dating app and the dating app states that you have to be 18 or older,” Martinez said. “But I knew it wasn’t possible because we never had sexual intercourse, we never did anything. She always wanted to, but I just chose not to because I thought it was weird, you know?”

Anyone with information is asked to call the Amador County Sheriff’s Office.