You never know. This Brazilian guy may have in the past had an experience with a Brazilian Death Squad who are mostly police
& have been recently active in Brazil.. Therefore he may not have had trust about any police... Thats my Theory anyway.
Heres a Wiki piece about Brazilian Death Squads...
"The "Death Squads" that were active under the rule of the Military Dictatorship have left a lasting legacy in the culture of the Brazilian police as in the 2000s police officers were still being linked to Death-Squad-type executions.
In 2003 alone roughly 2,000 people were killed in São Paulo and Rio de Janeiro, with Amnesty international claiming the numbers are likely far higher.[42][43]