Last November, DJ and producer i_o suddenly died at the age of 30. The cause of his death has now been revealed by the Los Angeles County Medical Examiner, and Billboard point out. According to the medical examiner’s report, i_o, whose real name was Garrett Lockhart, died of natural causes related to Hashimoto’s thyroiditis – an autoimmune disease that involves chronic inflammation of the thyroid.

I_o’s family posted a cause of death statement to According to the family, i_o had a “sudden and fatal arrhythmia”. They added:

After 5 months of testing, the conclusion is that while Garrett suffered from depression and anxiety, he did not commit suicide. We hope Garrett’s untimely death can be used to initiate and normalize conversations about mental health issues.

In the past few years i_o released three EPs that became one album called 444. In 2019 he appeared on Grimes’ song “Violence” from her last album Miss Anthropocene.