Where are Paige and Levi?

Oct. 23, 2008— -- Two Missouri families, desperate with worry and fear, are searching for their teenage children who apparently left a high school football game together nearly a week ago and haven't been seen since.

An Amber Alert has been issued for Christina "Paige" Alley, 14, who police think may be with boyfriend Levi Carlson, 16, in Levi's stepmother's missing maroon 1996 Toyota Avalon.

Levi's family fears the catalyst for the disappearance might be a series of tragedies in his life, from his grandfathers' death and sister's miscarriage last month to a violent fight he had with his father that landed Levi's stepmother in the hospital.

His father, Denny Carlson, told ABCNews.com today that Levi had been angry and questioning his relationship with God.

"We want him to come home where we can love him. We can get through anything as a family," Carlson told ABCNews.com.

According to a Web site set up by Paige's family after the dissappearence, Levi is "known to be bipolar and off his meds."

Levi's father confirmed his son's condition, adding that his son hated the "bipolar" label.

The Clinton County Sheriff's Department tried to get an Amber Alert issued shortly after the teens disappeared Friday, Maj. John Farmer said, but the department was told by the Missouri State Highway Patrol that the case didn't meet the criteria since there was no proof that either teen had been abducted.

"Originally, we though it could have been just a runaway deal," Farmer said.

But after pressure from the Alley family, the alert was issued earlier this week. For that to happen, Levi had to be formally named a suspect in Paige's disappearance.

But Farmer pointed out that no one really knows where the two are or what they are doing. Still, as more time goes by without a credible lead and with the added information about Levi's being off his medications and his scuffle with his dad, police are becoming increasingly concerned about Paige's safety.

"It's still all speculation," he said.