A Minnesota woman and her 13-year-old son, who were on the run from court-ordered cancer treatment for the boy, are reunited with their family, the Brown County Sheriff's Office said Monday.

Daniel Hauser was having his Hodgkin's lymphoma evaluated by a doctor at a hospital in the Twin Cities on Monday, according to Tom Hagen, an attorney at the law office representing Daniel's parents, Colleen and Anthony Hauser.

Brown County Sheriff Rich Hoffman said the warrant issued for Colleen Hauser was lifted, and a similar one from the FBI was also expected to be dismissed.

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On a video released by the sheriff's department, Colleen Hauser described how the first chemotherapy treatment Daniel received made him sick and she said he planned to run away from home.

"Then what do I have? I mean, he was going to run," Hauser said. "And that just broke my heart. I can't have one of my children running away from something that they should face."

Hauser expresses optimism that her son can beat cancer, but the video doesn't disclose where they were or when it was made. The video was produced by Asgaard Media, which also arranged the charter flight for the mother and son to return home.

At one point on the video, an unseen woman asks Daniel what he'd say to people who claim he's not old enough to decide whether he needs chemotherapy. "I'd tell them to back off," he replies.

A California attorney, Jennifer Keller of Orange County, contacted the Brown County Sheriff's Office Sunday on behalf of Colleen Hauser, saying the woman wanted to bring her son home, Hoffmann said.

It was not immediately clear how Keller became involved, or if she knew the family previously.

"The court was informed of Daniel and Colleen's voluntary return and because of the county's and the court's intention of reuniting the family, the warrant was quashed (lifted)," Hoffmann said. "It is my understanding that the federal fugitive warrant will also be dropped which typically happens in these cases."

Brown declined to comment on any future charges anyone involved in the case could face.

Streets getting to the family's home were reportedly blocked to give them a "sense of safety to know they can be by themselves," Hoffmann said.

Daniel has Hodgkin's lymphoma, a disease which doctor's say has a 90 percent chance of being cured in children if treated with chemotherapy and radiation. Without those treatments, he has a 5 percent chance of survival.

Daniel underwent one round of chemotherapy in February, but stopped after that single treatment, citing religious beliefs. The family opted instead for natural healing practices inspired by American Indians.

A judge ruled that the parents medically neglected Daniel and ordered them to get him an updated chest X-ray as well as select an oncologist for a re-evaluation. After the X-ray showed a tumor in Daniel's chest has grown, the mother and son left town.

The FBI said the pair flew from Minnesota to Los Angeles last Tuesday on Sun Country Airlines. Authorities said they were focusing their search in southern California and northern Mexico, after the pair was spotted in southern California on Tuesday. Investigators suspected they might have been heading to one of a number of alternative cancer clinics in northern Mexico.

The American Cancer Society estimates there are 35 to 50 clinics in Mexican border towns that attract cancer patients looking for alternatives to traditional U.S. treatment methods. Many of these clinics have offices in the San Diego area that serve as contact points for U.S. patients, who are then referred to clinics in Mexico.

Dr. Bruce Bostrom, the pediatric oncologist at Children's Hospitals and Clinics of Minnesota who diagnosed Daniel's cancer in January, said he was happy to hear of the boy's return.

"I'm delighted," Bostrom said. "I've been so worried that he was going to die in Mexico. I've been praying for his safe return, so I think my prayers will be answered."

Bostrom was not working Monday and didn't know if Daniel had gone to Children's Hospitals to be examined.

On Thursday, Anthony Hauser appeared before reporters asking his wife to call him and to come home. "If you're out there, please bring Danny home so we can decide as a family what Danny's treatment should be," he said.

The FBI's affidavit in support of an arrest warrant for Colleen alleges she fled the state to avoid being prosecuted on two state counts of depriving another of custodial or parental rights in Brown County. The "parental rights" refer to those of Brown County family services, which was granted custody of Daniel to get him to a pediatric oncologist.

At a news conference Thursday, Brown County Sheriff Rich Hoffmann vowed to arrange a safe return for Colleen Hauser without an enforcement action if she shows "a good faith effort to come back."

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FOXNews.com's Michelle Maskaly and The Associated Press contributed to this report.