Carlos Eduardo Sundfeld Nunes was a Brazilian who killed four people, two of them in 2010 - the cartoonist Glauco Villas Boas and his son - and other two people in different years. He apparently committed the 2010 crime to prove to his mother that he was Jesus Christ, but the reason to why he shot Villas Boas and his son Raoni still remains a mystery. He was an follower of Santo Daime, who is known here in Brazil to have a hallucinogenic tea, ayahuasca among other things. Nunes was murdered in prison in 2016.
Unfortunately there doesn't seems to have much sources in English here, so if you want more information on him, just ask me on this thread. I will check a Brazilian source, and translate it here. Regards