If Salmond is found guilty of any of the charges, no point in a further investigation politically. If he is found not guilty, it looks like a witch hunt even with the different burdens of proof.
If it was not proven, who knows!
Wrong - just because Salmond is found not guilty (or not proven) of criminal charges with a 'beyond reasonable doubt' standard of proof, this doesn't mean that he shouldn't be subject to disciplinary proceedings internally - presumably misconduct or gross misconduct - with a 'balance of probabilities' standard of proof. And this is anything 'politically' but about justice.
So an example:
Imagine an employee goes out at lunchtime and gets blind drunk. He returns in the afternoon to work and has a go at their boss calling her a 'f****g c**t' and takes a swing at her. The employee is so out of control that the police are called and he is arrested and ultimately charged with being drunk and disorderly and assault. He is tried but found not guilty on 'beyond reasonable doubt' - does that mean that's the end of it? Of course not - once the criminal charges have been assessed he will be subject to disciplinary action on gross misconduct by his employer and likely as not that will be proven and he will lose his job.
That is quite right and proper - the notion that because he wasn't convicted of a criminal offence means that any misconduct inquiry internally should be shelved is nonsense. In what way would it be a 'witch hunt' if this employee was found guilty of gross misconduct and sacked by his employer?