n imprisoned several times over the past six years on suspicion of
This alone sounds weird.
and then be released after posting a cash bond
This has gone on for six years.
Nothing special for the Polish legal system which is one of the least efficient in Europe.
In the latest incident, he's been held for six months, and was scheduled for release two days ago. The prosecutor went to the judge and was granted permission to hold him another 90 days. Does this really happen?
I'm told this is not uncommon.
It doesn't quite have the ring of truth. Are you sure he's actually been in prison and not elsewhere?