Authorities say Kendrick Johnson fell into the mat and suffocated while trying to retrieve a sneaker. His family suspects the 17-year-old was murdered and that someone has tried to cover up evidence in the case.
They spoke about their son and new surveillance video released this week on "New Day" Friday to CNN's Chris Cuomo.
They say the footage of the Georgia teen found dead inside a rolled-up gym mat raises more questions than it answers.
There were 36 cameras inside and outside the gym of Lowndes High School in Valdosta, where the body of Kendrick Johnson was discovered. The video was released as a result of legal action, filed by his family, that CNN joined.
Johnson's family suspects the 17-year-old was murdered and that someone has tried to cover up evidence in the case.
One clip shows Johnson in the gym. A second shows him walking in, then running out of the frame. In both videos, students suddenly appear.
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