Your 'Supreme Leader' is a criminal. He has abused his power. He should be Impeached.
Impeachment is a political process that deals with abuses of power.
If you have legitimate criminal charges you should be able to file them with the relevant authorities and they are bound by their duty to investigate them and file the appropriate charges in a court of law.
To explain the difference we can look at what happened to VP Agnew who was criminally charged with extortion, tax fraud, bribery, and conspiracy. He was forced to resign and ultimately cut a plea deal. Nixon was facing impeachment for abuse of power in the Watergate scandal. He had used his office to thwart the investigation and that is what prompted the impeachment. Yes, there were other charges but the knowledge of the Watergate break in and then his deliberate actions to cover it up were what resulted in the impeachment.
So if your allegations hold any credibility you should be able to present the evidence of criminal wrong doing to the authorities and they will then proceed to investigate. Right now, however, you don't have anything credible.