According to someone who went to school with Jonathan:

"I went to school with him. He got a tongue piercing and somehow suffocated in his sleep. It was determined to be accidental. The rumor has it, his tongue hurt so he took something to help him sleep and he somehow suffocated on his tongue because it was swollen. His mom found him dead in his bed or something like that. His mother told me that his tongue was so swollen that it blocked his airway."