On topic:
There's only 3 real options in regard to Vogel: he's dead, a fleshform, or being brainwashed to be a better merge.
Damien Knight, there is no way he would not know Otto Stevens is Otto Hendricks.
Why else would Hendricks target Vogel supporters?
A possibility is that Knight plans on framing the whole mess on Vogel, if word gets out about Hendricks.
"I did not know that most, if not all, of Vogel's supporters were fleshforms.
And how would I know Vogel hired Hendricks?"
It's pretty hard for a corpse to defend themselves.
On Renraku:
Jumping into the limelight is not their style.
Not with all the effort they put in to make themselves as discreet as they have.
They might buyout as arcology, but even then, they would (try to) keep it quiet.
Too many people remember the SCIRE.
Noone wants to imagine another incident like that in their backyard.