Suicide must be the ultimate difficult thing to live with, I cannot imagine, and I find it so disturbing in so many ways, and hope and pray that I never have to personally endure that kind of grief. I hope they get provable answers in this case, and hopefully the family's independent investigation, and so early in the timeline, will reassure the family of whatever the findings come back with.
It seems unfair to suggest that 'people are using this tragedy to play some sort of sick detective game' however, as delving into mysteries and suspicions and uncertainties in cases which are anything but clear, is what we tend to do here, as 'sleuths'. Unfortunately we are each affected differently by any given case, depending upon our own life experiences and personal baggage, history, and tragedies. I'm so sorry to hear about your brother.
