No, it's not, at least not in Brazil. As mentioned above, wiretapping need to be authorized by a judge. The police must provide a reasonable justification. If the provided justification is weak or deemed unlawful, a lawyer can exclude all the data collected in trial.
If privacy is a human right that cannot be violated ever, how are going to deal with criminals that use services such as WhatsApp?
If privacy is a human right that cannot be violated ever, how are going to deal with criminals that use services such as WhatsApp?