In order to take Uesugi Shion away, he disguised himself as a doctor, used dry ice pellets and glycerol to produce thick smoke, and triggered the fire alarm—as a lawyer, he was naturally aware that this series of actions violated Article 117 of the Penal Code related to the crime of using explosives and Article 8 of the Fire Services Act.
Furthermore, considering his escape afterwards, he estimated that he would face harsher punishment if exposed, facing a prison sentence of more than 5 years and a fine of up to 1,000,000 yen.
The price he paid was undeniably high.
However, since Uesugi Shion was on the Heavenly Punishment list, sentenced to death in the court within his mind, he felt that what he did was all in the name of justice.
As long as he wasn't caught, it wasn't considered a crime.