Firstly, he's innocent until proven guilty.
Secondly, it wouldn't be the first time that enemies, having ousted somebody from a position of influence within an organisation, make all sorts of allegations against the employee. Sometimes its true, and sometimes its not. At the end of the day, we can only wait on the court case.
And why should he stand-down from anything? If he is found guilty, he'll be punished in many ways then. Possibly gaol, and certainly losing his employment. It would be the very definition of unjustified to punish him before the verdict.