"One of my favorite quotes from Dr. King was 'Now is the time to make real the promises of democracy," the vice president said.
Four members of the group No More Deaths face a maximum sentence of six months in prison and a possible $500 fine.
The young man, Nick Sandmann, said he respected all races and was trying to defuse the incident at Friday's Indigenous Peoples March.
Leaders of the school’s black student group said in an open letter to the administration that the video was not an isolated incident.
There is a growing effort to honor service members who die homeless or destitute and often without family by their side. The American Legion and other veterans groups have made it their duty to attend their burials, making sure the veterans receive full military honors.