SAN FRANCISCO — The parents of a former OpenAI researcher known for recently blowing the whistle on the company’s business practices are questioning the circumstances of their son’s death last month. In an interview this week, Suchir Balaji’s mother and father expressed confusion and shock over his sudden passing, expressing doubt their son could have died by suicide, as determined by the county medical examiner. The family hired an expert to perform an independent autopsy but has yet to release the report’s findings. “We’re demanding a thorough investigation — that’s our call,” said Balaji’s mother, Poornima Ramarao. San Francisco police found Balaji dead in his Lower Haight apartment on Nov.