Transcript for Parents fight for custody after stopping son's chemotherapy
We're back with the parents battling to get their 4-year-old after losing custody for stopping his chemotherapy and treating his cancer with alternative methods instead. The little boy now living with his grandparents while his mother and father fight for him in court. Paula Faris is here with that story for us. Good morning, Paula. Reporter: Good morning. They want their little boy back. Noah Mcadams diagnosed with leukemia and the state took him away because they were seeking alternative treatments. This morning a mother and father are fighting to regain custody of their young son. First step of healing is belief within and being in a positive state of being. Reporter: 4-year-old Noah was diagnosed with acute lymphoblastic leukemia earlier this year. His parents stopped chemotherapy just days into treatment. He had vicious mood swings making him violent, making him very emotional and he also started to lose his hair right away after the first treatment. Reporter: The couple then turned to alternative treatments including medical marijuana and CBD oil. The increasingly popular cannabis extract sold over the counter. Did you consent to chemotherapy? Yes. At the time that you consented to chemotherapy did you believe that chemotherapy was necessary for your son to survive cancer? I wasn't sure. I don't know. Reporter: The couple took Noah out of state to seek a second opinion. They were found in Kentucky after a nationwide search. The state of Florida placing the boy in the custody of his grandparents who were ordered to resume chemotherapy. This is not about whether we're choosing alternative therapies, natural therapies. This is about our rights as parents to seek other options. What makes this case different from, for example, refusing vaccinations is, first, you have a child who is actually ill. He has an identifiable disease and he has a treatment that according to the evidence has a very high rate of success. Reporter: Experts tell ABC news the standard protocol for treating Noah's cancer has a 90% success rate for parents following the chemotherapy regimen. Now, the trial is expected to end today. The judge has 30 days to rule but it raises so many questions. Why did the state intervene? What are parents' right also it comes to seeking alternative treatments? So many questions about this case. And we hear that little Noah's alternative methods are being included in his treatment. Yes, still undergoing chemotherapy and CBD oil. We wish him the best. That's tough. Thanks so much, Paula.
This transcript has been automatically generated and may not be 100% accurate.