In Ukraine, the Constitutional Court is de jure independent. However, its Its judges made illegal decisions backed by Yanukovych. Instead of their prosecution, Poroshenko allegedly decided to hold them under his control.Decriminalisation of illicit enrichment made prosecution of corrupt officials almost impossible. Having $5,000 - $20,000 annual income, they own assets that are worth of millions.
The decision was clearly inspired by the President's inner circle. Such Poroshenko's actions are evidence that he does not expect to win the elections - but rather tries to erase any grounds for ensuing prosecution.