Governments should reserve judgement until a conviction has been secured, but I do not believe that it is reasonable to demand that private individuals do the same. A presumption of innocence is about limiting the circumstances in which governments can restrict the rights of somebody, but it makes little sense outside of courtrooms.
Consider: Richard Nixon was never convicted. Does that mean I can't/shouldn't call him a criminal piece of shit?
What I'm saying is, we don't have hard evidence pro or against Karpeles, what we have is a lot of speculation, typically made by angry people who lost part of their savings (or all of it in the case of Mr. Sillysaurus) in the MtGox collapse. That is not sufficient material to start a mob lynch.
The current investigation will hopefully surface whether the debacle was the result of genuine mistakes on the part of MtGox, or the result of wrongdoings. I'm personally reserving my judgment until we have more trustable information.
> we don't have hard evidence pro or against Karpeles
There is a lot of hard evidence:
1. 800k+ bitcoin that are gone
2. Public statements by Karpeles that all was ok on numerous occasions
3. Frozen withdrawals for months that hinted at liquidity problems that were denied (which is a crime)
4. A leaked crisis strategy draft, later admitted by Karpeles as a legit internal document, that showed MtGox knew at least a month before d-day that they were in trouble and trading insolvent.
5. The malleability bug excuse used as a cover to liquidity problems
6. Timeline of withdrawal problem suggests earlier knowledge and inaction
What is in doubt is the extent of the coverup, who else was involved and if Karpeles really was behind a plan to ease the liquidity burden by settling his goxbux debt by hyperinflating his remaining bitcoin holding value, and "printing" bitcoin by buying on the market in exchange for GOX USD - which could then be smuggled to another (legit) exchange in return for real USD that could be used to pay back the deflated goxbux.
I lost all of $0 and 0 BTC in the MtGox fiasco, but this has no bearing on the ethics of Karpeles, and it's quite absurd that there is no ongoing criminal investigation. It's appauling. It's an outrage!
Consider: Richard Nixon was never convicted. Does that mean I can't/shouldn't call him a criminal piece of shit?