On February 17, during the Carnaval festivities in São Paulo, deputies and city councilors have formally requested that the Public Ministry of São Paulo investigate the Metropolitan Civil Guard's (GCM) alleged use of excessive force against participants of the traditional Vai Quem Qué bloco. Eyewitness reports detail incidents of tear gas and pepper spray being deployed against revelers, raising serious concerns about police behavior during public celebrations.

One participant, Lira Alli, who plays saxophone in the bloco, reported being on medical leave due to respiratory issues reportedly exacerbated by exposure to the tear gas and pepper spray. This incident occurred while the bloco, which proceeded along a predefined route in the Butantã area of São Paulo, was dispersing peacefully when the conflict erupted. The event has sparked a debate on the appropriate use of force by law enforcement during cultural and social gatherings.

The GCM has defended its actions, alleging that their response was prompted by resistance and the throwing of objects by some individuals toward officers. This confrontation highlights ongoing tensions between Carnaval participants and law enforcement, calling into question the balance of public safety and the enjoyment of civic rights. As the MP investigates, the outcome may influence future policies and practices regarding police crowd control in urban settings during festive events.