André Mendonça, a minister of Brazil's Supreme Court (STF), has taken significant steps to increase transparency in the investigation of Bank Master's fraud cases by reducing the level of secrecy imposed by his predecessor, Dias Toffoli. This move was made in response to a request from the Federal Police, allowing them to conduct ordinary investigative procedures, including interviewing witnesses and suspects involved in the case.

In his new role as the case's rapporteur, Mendonça mandated that any future investigations related to the Master case must be explicitly requested and justified to him personally, ensuring a more centralized control over the proceedings. The establishment of these protocols aims to streamline the investigation process while maintaining accountability and oversight.

Mendonça's appointment as the new rapporteur occurred after an agreement between the justices of the STF, which led to Toffoli stepping down from the case. This change in leadership is noteworthy as it reflects the ongoing judicial dynamics within Brazil's highest court and signifies a potential shift in how such significant cases are handled, focusing more on transparency and proactive investigative measures.