LUBBOCK, TX (KCBD) - We are now hearing from Anna Ysasaga-Cuevas for the first time since authorities recovered her son's body.
15-year-old Mark Ysasaga disappeared in June of 2012.
"My mind's playing games that there could be a chance that he comes to the door," Anna Ysasaga-Cuevas says.
The past three and a half years have been hard for the family.
She says the day Mark disappeared, mother's instinct told her something she didn't want to hear.
"I had a sick feeling in my gut that something wasn't right," Anna recalled. "Like this is within a couple of minutes of just hanging up, why is he not answering the phone?"
The Lubbock Police Department first classified Mark as a runaway, then as a missing person.
And after three years of countless fliers, t-shirts, vigils, and searches, LPD reclassified Mark's disappearance as a homicide investigation.
They say Mark was killed in a Tech Terrace home.
"They just don't understand what they did to our family and to the community," Anna says.
Authorities have named Christian Castro and Jose Simental persons of interest in Mark's murder.
"The day before when they arrested Castro, we were happy. We were like, okay they got him on another charge, maybe they can go ahead and keep him and something will come out of it. Kept on watching the jail roster, to see if he's being booked. We kept refreshing, refreshing and we couldn't find anything," she recalls. "We're like okay, something is not right."
Anna says three detectives came to her home the next morning.
"It's- I don't know it's something I was waiting for, but it wasn't the knock I wanted," she says. "They came in and they said that they found his body and they know it's him. And, just after that, I don't know, it seems like it didn't happen."
Authorities now say it was Castro who led investigators to Mark's body in exchange for a $10,000 Crime Line reward.
We asked Anna, when you heard about the Castro, Crime Line tip, what were you thinking?
"I was upset because that money, I know that was for my son, to find him," she says. "But, it was the money that communities raised, and they didn't raise it to give to a person that's also involved with it. Or, a person of interest as they say. I'm glad that he told where my son's body was, but I'm not happy of what the outcome of it was."
She says the thought that Mark's body was found on private property off of Highway 87 and Avenue P, just a few miles away from home, is unreal.
"I would drive down the interstate, not knowing he was just right there," Anna says. "I would pass by him so many times not knowing."
Has it gotten any easier?
"It never gets better," Anna says. "I think it just gets harder."
Mark's mother says she can only hold on to the memories of her son - his laughs, his scent, and his hugs.
"I look at his picture every day," she explains.
21-year-old Simental has been in jail since last May, charged with Mark's murder, but Anna says she will continue seeking justice for her son.
"I want every single person that was involved, arrested," she says. "Even if you didn't actually kill my son, but if you were there to clean up his blood or help dispose of his body, dig the hole, anything… I want that person arrested and put away."
She says she won't fully find closure until Mark's funeral and unfortunately, this grieving mother doesn't know when that will be, because authorities still have custody of Mark's body.
Anna hopes to create a foundation to help other parents who also know the pain of having a missing child.
"I hope maybe with this somebody else that knows something will come forward," she says.