Stephanie Hart-Grizzell, 16, and Nick Kunselman, 15, were killed early on the morning of Feb.
14, 2000, at a Subway shop near Columbine High School.
20 years later, murders of 2 young Columbine students at Subway shop remain unsolved
Credit: 7News - The Denver Channel
Duration: 02:23s
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WAS MAKING THE RIGHT DECISION.