KwaZulu-Natal police DNA used to identify a body found in a ravine in Longbury Drive in Phoenix north of Durban as his.
Detectives informed the family on Wednesday of the match.
Miguel's aunt, Sheryl Louw, says they are angry.
"From what I've seen, everyone is very bitter because of the grief and the pain, justice has to be served," she said.
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Meanwhile, Rippon Primary School today holds a memorial for Miguel.
Teacher Kelly Duloo says that the classmates of the boy also need help.