According to The Sun, Mauricio Nunes Goncalves was shot repeatedly at a street bar in Samambaia near the capital Brasilia. The 38-year-old is reportedly the brother of the partner of Endrick's older sister, Lavinia Sudre, but is being referred to as the 18-year-old's brother-in-law.
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"IN OUR HEARTS"
After the 'targeted' shooting, Sudre changed her Instagram profile picture to one showing a black ribbon. She also posted a photo of the victim, named him, and added: "You left beautiful memories in our hearts that we will never forget."
Reports suggest no arrests have been made so far.
Lavinia Sudre/Instagram
DID YOU KNOW?
Goncalves' funeral was scheduled to take place on Boxing Day. Witnesses reportedly told police there was no prior argument between the gunman and his victim and described it as a 'cold-blooded execution'.
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WHAT NEXT?
Youngster Endrick, who left Brazilian team Palmeiras for Real Madrid earlier this summer, is yet to comment on the matter.