Has someone been harmed, and does Herbert, as the prime suspect, need to explain to everyone that he has been wronged?
Logically, yes, he should.
However, there are many ways to explain.
Cooperating honestly and proactively providing evidence is one way, and also the most secure approach.
But that's not what Herbert would choose.
He doesn't need, nor can he afford, to waste his breath begging others to believe him.
It's too humble and too passive, completely putting one's fate in the hands of others to toy with.
This world has too many people who don't care how many bowls of noodles Six Ate, they just want to see Six open his stomach.
Herbert, with so many secrets on him, absolutely cannot hand over the initiative to others.
He can't risk it.
The Ascetics might be on the side of justice, but not everyone harbors good intentions.
Therefore, Herbert chose to take the initiative.
Aren't you suspicious of me?
Fine.
Then I will prove it to you, let you see my "innocence"!