Why? Seriously asking (I sometimes sneer, but I never troll).
Perhaps the exact things that went through his mind to make this do this are not productive to speculate upon, but the overall incident with the police etc, is a public issue.
Person A makes a speculation.
Person B interprets Person A's speculation as the most likely explanation of the situation.
Persons C, D, and E overhear Person B describing Person A's speculation as fact, and start a mob over it. (Person A was wrong, by the way.)
This continues to snowball until people who were originally close to the situation (and are themselves still struggling to put the pieces together) are put through even more unnecessary trauma by complete strangers, in the middle of one of the most upsetting moments of their lives.
The alternative is to wait until the people most directly affected have had time to cope, get affairs in order, and figure out how to adequately convey what's happened to the greater population.
His family asked for privacy probably because they are trying to deal with this and don't want anyone online or real life to start speculating / discussing or making insinuations (he was already called "unhinged", there is a call to start arresting some cops etc).
Maybe I am being silly wanted to turn this into people trying to say something positive about his life, or his contribution, maybe someone knew him. Everyone probably used or touched Debian in one form or another etc.
But oh well, people want to gawk, speculate, call names, seek revenge without knowing what happened, can't stop it, I tried.