Though it may be tempting to summarily dismiss this due to the individuals involved and their historically elastic relationship to the truth, even a broken clock is right twice a day. The investigation (paid for) by the mother seems to have identified things that don’t necessarily gel with a conclusion of suicide.
In an adjacent research project I asked 5 LLM's today about suspicious deaths relating to whistleblowers. All 5 identified this case. I was surprised as I did not think there was much media coverage to have made it into training data. It's a hard prompt to get around content safeguards as it is.