Where Is Azucena?

For almost two years, the mother of Azucena Valdez has been waiting to hear from her daughter after she disappeared on the last day of school.

As The Early Show national correspondent Hattie Kauffman reports, Azucena was profiled during Thursday night's broadcast of the CBS drama "Without A Trace."

Her mother, Maria Valdez, tearfully says she is "waiting for the phone to ring, but it never happens and I'm still waiting for her."

Azucena was just a ninth grader, still wearing braces on her teeth, when she vanished in 2004.

It was June, the last day of classes. Detective Douglas Thorson of the Cache County Sheriff's Department says Azucena was last seen getting off the bus at South Cache Middle School in Hyrum, Utah.

Police have a theory about what happened to the teen: They believe she was kidnapped by Cesar Sanchez, who was 22 years old at the time and had a relationship with Azucana.

In fact, Azucena might have been pregnant with his child.

"We don't have enough evidence to say whether it was a forcible abduction or she was coerced or went somewhat willingly under false pretenses. We don't know," Thorson says.

"Two days before my daughter disappeared, she was crying," remembers Maria Valdez. "She started crying and said 'I don't know how to tell you this, but I don't want nothing bad to happen to me or happen to you guys.' And I said 'What does that mean you trying to tell me something?' And she said 'I don't know, I'm scared,' you know, and two days later she disappeared."

Detectives say the girl has contacted them twice, asking them to stop looking for her. But Thorson says investigators believe she is reading from a prepared script. "It was apparent there was someone in the background," he says.

Sanchez's mother, who still lives and works in the area, says her son is not a kidnapper.

"I can tell you never happen anything with her. She be all right because I know my son. He's a very, very nice son," says Gloria Sanchez.

But Sanchez has a history of run-ins with the law, mostly for minor offenses.

Today, Azucena would be almost 18, and perhaps, by now she is a mom.

"Maybe it's possible she can be pregnant or have a baby, but no matter what long as she's OK. The only thing I want is to find my daughter and give her a hug and a kiss," says Maria Valdez. "I don't know if she's alive or dead. The only thing is I have to be strong for good news or bad news."

Police still have no answers.

"We just simply do not know, so I can't give her mother answers to her daughter's welfare. That's the biggest pain to all this — we can't give the parents closure of any kind," says Thorson.

Maria Valdez isn't giving up hope that her daughter will return.

"My greatest hope is to find her and I know one of these angels is going to find her," Valdez says, crying. "That's my hope."