Lexi Contreras was a competitive speed skater and an Olympic hopeful.
Coaches called Michael Peterson an "iron man" for excelling in five sports.
But last fall, the two promising teens found themselves in a drug rehab center in East San Diego County: Sovereign Health Group.
The facility treats young people suffering from a variety of behavioral problems and addictions. Parents send their children there with the hope they'll get the help they need.
Alexandria Bekele, Lexi’s mother, said there were warning signs something was wrong.
“She (Lexi) stopped wanting to participate in her sports, and that's when I knew something was completely wrong," she said.
Lori Peterson Owen also noticed changed in her son, Michael.
“He said, ‘Mom I don't really have an enjoyment for life anymore, don't care if I live or die,’” she said.
Owen left her son at Sovereign Health on Sept. 26. Bekele dropped off her daughter on Oct. 5. Both teens were 16 years old. The teens accepted a minimum 30-day residential treatment for drug addiction.
“I was very nervous to ensure my son to some people I didn't know," said Owen.
Their treatment lasted less than three weeks.
On Oct. 18, Owen and Bekele said their teens and four others climbed the rehab center's fence and ran off. Both parents were notified by the Program Director, Jason Hennick.
Bekele said he didn’t seem alarmed: “He sounded like it was a common thing.”
San Diego County Sheriff’s Department records show it investigated 29 instances of teens running away from Sovereign Health in 2015 -- an increase from two cases in 2014.
“You leave your child there, you think they are in a safe facility,” said Bekele.
NBC 7 Investigates had an interview scheduled with Hennick, but two days before, the company canceled it and instead sent NBC 7 Investigates this letter.
In the letter, citing HIPAA guidelines, Sovereign’s Senior Director of Strategic Development Jamie Deans said the facility could not confirm Michael or Lexi were patients.
According to the letter, Sovereign is "a non-locked and no restrain facility. State licensure guidelines dictate that, should a resident decide to leave treatment, the staff will not attempt to restrain the resident."
A requirement of California law states no child in a group home "can be locked in any room, building, or facility.”
Click here to read more about the state law.
Despite the state law, William Grimm, Senior Attorney for the National Center for Youth Law, said Sovereign can and must do more to prevent runaways.
“It’s just inexcusable; this kind of outrageous increase in the number of runaways in this facility has gone unresolved," said Grimm. "There are lots of things that contribute to this, things such as staff not being qualified to address the issues for which children are admitted to the facility, staff not trained well enough programs and treatments that don’t meet the needs of the children there.”
As for Michael and Lexi, weeks passed with no word from them.
Bekele said she thought she would never get her daughter back. “I hadn't heard from her; there have been no confirmed sightings of her. I am thinking she's probably dead,” she said.
Because the teen’s voluntary ran away, the mothers says the Sheriff's Department told them the department couldn't devote resources to finding them.
Bekele and Owen said Sovereign employees didn't step in either.
“Their level of involvement was zero,” Bekele said. “I was extremely disappointed in the fact that I didn't get one phone call. None of us got one phone call from anybody at the facility to say, just want to know how you're doing.”
A spokesperson for the Sheriff's Department said the agency "responds, takes reports, and assigns cases on all runaway juveniles - as well as all missing persons. These investigations are assigned to specialized detectives, who pursue leads to their logical conclusion."
The mothers also said Sovereign continued to charge them for their children's treatment.
“We were billed after Michael wasn't there on the 18th,” Owen said. “But we were billed through the 20th to the 21st. So they even tried to get extra days when Michael wasn't even a patient there.”
Sovereign is licensed and inspected by the California Department of Social Services.
NBC 7 Investigates checked inspection records and found since being licensed in June 2014, the facility has not been cited for any violations.
Click here to see the inspection records.
Thirty-four days after fleeing the rehab center, Bekele said she found Lexi roaming the streets in Ocean Beach.
“She looked tattered,” Bekele said. “'I just don't want to go back to a rehab! I don't want to go back to that place.'”
Michael was found in downtown San Diego 44 days after running away.
“He was alive and he was in bad shape,” said Owen.
Both mothers said they believe Sovereign and other teen rehabs need more oversight and more resources for teens and their families.
“Rehabs in general , especially this one, I think they are more of a business than they are there to truly help people,” Bekele said.
Owen said, “I put him in Sovereign to keep him safe and they didn't do their job. The system failed Michael. The system failed us as parents. And I hope that whatever I'm saying can help another parent who's seeking help for their teen.”
If you or someone you know are looking for resources or help for a teenager, you can start by contacting the government's Treatment Locator service at 1-800-662-HELP (4357) or go to their website.