I pick on Vlad, there's plenty more to choose from. Now the evidence exists to remove doubt from the accusation of corruption for, it would seem, a lot of politicians.
Jackie Chan - Wealthy movie star. Plenty of good explanations for why he'd engage in offshore banking with his very large, legitimately gained, fortune.
That's the difference.
This seemed extremely unlikely to me, so I Googled it. If you mean this story:
http://www.nytimes.com/2016/04/03/us/mikhail-lesins-strange-...
it doesn't say anything even remotely like Putin straight-up murdered a guy (a scumbag who has spent his life associating with and/or making enemies of other scumbags) on American soil.
In fact it doesn't even straight-up say he was murdered at all, by anyone:
The police [in the US] continue to treat Mr.
Lesin’s as a natural death
and: Neither the F.B.I. nor the Justice Department
has taken a role in the investigation [...]
suggesting that it was being investigated as
an untimely death but not a federal crime.[1] https://en.wikipedia.org/wiki/Poisoning_of_Alexander_Litvine...
In other words: "He's a bad guy you know -- he's capable of anything" isn't, in my book, sufficient reason to believe that he was actually involved somehow.
Also, in some cases hiding money offshore is indeed illegal. One example that immediately comes to mind is for individuals holding public office in Iceland.