Pedro Rodriguez Filho
The death of at least 71 victims was attributed to Pedro Rodriguez Filho, who was detained in 1973 and convicted in 2003. A sentence of 128 years in prison was imposed on him. In retaliation for the murder of his girlfriend while he was in jail, the Brazilian Maniac killed his first victim at 14 years old.
It is even believed that he assassinated his own father while he was in jail for murder. During his confinement, Filho murdered at least 47 prisoners. As a result of his ongoing killings, his sentence has been increased to 400 years in prison. According to Brazilian law, the longest prison term is 30 years, so he was released in 2018.