His name is Adam Koessler and he's facing criminal charges in Australia for treating his two-year-old daughter with medical cannabis oil.

Rumer Rose has stage 4 neuroblastoma cancer, which affects the nervous system.

She was given a 50% chance of survival while having radical chemotherapy treatment.

More than 75,000 people have signed a petition for charges against Adam to be dropped.

Rumer has an 11cm cancerous growth putting pressure on her internal organs.

Her dad says he thought he would try something different and researched medical cannabis.

After giving Rumer some medical cannabis oil he says she changed completely and was in much less pain.

He told Australia's Newcastle Herald Newspaper that the oil was having a "miraculous" effect on his daughter.

"What we saw when Rumer was given the medical cannabis oil was nothing short of miraculous," he said.

"She would say, 'Daddy, tummy's not sore' and she would be able to eat like a champion and began to gain weight."

The stages of cancer The stage of a cancer is a term used to describe its size and whether it has spread beyond its original site



The scale often runs from one to four



Four is the most serious



There's also the TNM staging system which uses Tumour (The size of the cancer and how far it has spread into nearby tissue), Node (whether the cancer has spread to the lymph nodes) and Metastasis (Whether the cancer has spread to another part of the body)

But he was arrested and charged with supplying dangerous drugs to a minor under 16 and is now on bail.

Originally the conditions meant he had no contact with Rumer or her mother but those conditions have been relaxed.

The petition calls on leading politicians in Queensland to drop the case against Adam.

"Medical cannabis has been legalised in many countries and jurisdictions around the globe," it says.

"There is ample evidence to show that it has many beneficial effects for cancer patients without the harmful side-effects and other associated risks of current drug treatments."

The family moved to Brisbane to be closer to specialist treatment for Rumer.

Hundreds of people have been protesting outside the hospital supporting Adam while the case has caught the Australian national media's attention.

Many people have been using the hashtag #iamadamkoessler.

Fewer than 100 children in the UK are diagnosed each year with neuroblastoma.

Most children who get this cancer are younger than five.

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