1The proceeding organ may decide to join the proceedings:
awhen a criminal offence under investigation has been committed by several persons in collaboration among them or when several persons have independently caused the commitment of the criminal offence;
bwhen a person is accused of several criminal offences.
cwhen a person is accused of more offences, some of which are committed to accomplish or conceal others or to ensure to the perpetrator or other persons unlawful benefits or impunity.