mother aren't giving up. >> i want landon to know that we did everything in our power to be compassionate in his care and to protect him. i want him to know that we were willing to go to bat. he's a 3-year-old child. >> reporter: we did reach out to children's hospital a number of times. so far they've declined to discuss landon's care. and meanwhile, riddle says she and his doctors, are still at odds over his treatment, but they point out it's been nine months since he's had significant chemotherapy treatments and he remains cancer free. anderson? >> i've heard a lot of people treating chemo-induced nausea with marijuana. that's not what we're talking about, right? these people are saying the pot actually cured cancer. >> reporter: in this little boy's case that's how it start was this idea that medical marijuana could be used to help alleviate some of the ravages of the chemotherapy. then that's where sierra, his mother, and the lawyer took it a step further saying they believe it can actually treat the cancer