uA 14-year-old boy, with no known medical history, died suddenly in his sleep in Australia.

William Pfeiffer, from Queenstown, Adelaide, spent his last hours at his grandparents’ house last Sunday, when he fell asleep and did not wake up, according to news.com.au.

His parents, Karen Lynch and Mike Shaw, noted that William was a “happy, healthy” boy with a heart of gold.

They are now awaiting the results of the autopsy to find out more about what happened to their son.

It is said that William had no medical history that could explain what happened and that he had no worrisome symptoms on the night of his death.

Nicole Banes, an old friend of the teenager’s mother, said he went to bed “happy and well” while sleeping with his siblings at his grandparents’ house.

“I think they realized he was asleep in the bed, they went to see how he was and they realized something wasn’t right,” he told The Advertiser, describing it as a “painful and unfair” event.

According to this family friend, William “was a happy kid, his smile was radiant and he was a bit of a joker and joker, he made everyone laugh”.

Nicole Banes launched a GoFundMe to raise money for this teen’s family, who are struggling to come to terms with their loss.

Also read: A child dies after being found inside a car with a temperature of 33 degrees Celsius in Australia