Miami-Dade Circuit Judge Dava Tunis called the death of Juan Carlos Rivera, 17, "an enormous and senseless tragedy," The Miami Herald reported Wednesday.
Rivera and Andy Rodriguez, got into a brawl in September 2009 after bumping each other in a hallway at Coral Gables High School.
Rodriguez, armed with a knife, stabbed Rivera five times including a fatal blow to his heart, prosecutors said.
"Two families are forever torn apart and changed," Judge Tunis said in passing sentence on Rodriguez, 19.
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