Radziejowski started to conspire against the King with the enemies, and as a result was sentenced to infamy and banishment (exile) in 1652 by the Sejm Tribunal.

At the beginning of the seventeenth century he arrived at the court of King Władysław IV, where he quickly gained considerable influence, and most notably was appointed the starost of Sochaczew.

At the same time Radziejowski gained influence at the court of the queen, appearing at the same parliament session to defend her royal interests.

He then campaigned for the election of John II Casimir and supported his marriage to the widow of Władysław IV, Queen Marie Louise Gonzaga.

Working with Radziejowski was another nobleman, Marcin Dębicki, who headed the General Nobility Movement (the regional military council) and also accused the monarch of inept command and that the royal units allowed the Cossacks to retreat and escape during the counter-attack of the Polish army.

The next day Radziejowski was accused, before the court marshal, of insulting the government by his preceding actions and by breaking the law (under the term subject to any armed incident in the four weeks preceding the Sejm sitting, on the members or dignitaries of state law, however, this policy was never used before) and safety violations of a royal residence.

Radziejowski successfully hid from the envoys of the king, not allowing them to provide him with a lawsuit, so that later he claimed that he was not aware of the trial; he also accused Słuszka of insulting the Crown Court in Piotrków Trybunalski.

The court in this case – in the absence of Jerzy Sebastian Lubomirski, who, as the Grand Marshal, was responsible for the protection of the king and his house but after a quarrel with Vice-Chancellor Słuszka he left the capital – was chaired by the Deputy Speaker of the court of the Crown Łukasz Opaliński, who greatly supported Radziejowski's politics and policies.

The nobles blamed the royal court of provocation – previously Słuszka was provided the King's patronage after he saved the monarch's life, therefore he was protected by the Crown.

He then turned to the Polish Sejm for help and protection, but the displeased nobles and the furious and insulted royal government instantly refused.

Upon the return of Prince Jerzy Sebastian Lubomirski, the Sejm and the Crown Court recognized Radziejowski as a traitor and an enemy of the state.

His position at the side of the king has never been greatly influential, however, Radziejowski skillfully tried to make an impression on the nobility and later he asked for the protection from the Swedish parliament.

The parliament, following some disputes, forgave him all the insults, but still claimed that the rehabilitation of honors and his titles would be to risky and cause damage to the current government.