Riley Howell, who tried to tackle the shooter, had four wounds to the head or neck, two to the chest and one on each arm during the April shooting at UNC-Charlotte.
The footage, shot by a confidential government informant, was obtained by NBC News after eight people were indicted on federal dog-fighting charges.
The jury found Officer Jonathan Aledda guilty of culpable negligence but found him not guilty on two counts of attempted manslaughter.
“The mission of El Museo has always been a point of contention," El Museo del Barrio curator Susanna Temkin says.
It is the third shark attack in North Carolina this month.