Ahmaud Arbery's killers "did everything" on assumptions, prosecutor says, as jury sees video of fatal shooting

Brunswick, Georgia — The trial for the three White men accused of murdering Ahmaud Arbery had an emotional start as the slain Black man's mother watched graphic video of her son being chased down and killed. 

Wanda Cooper-Jones sobbed in court as she watched the video for the first time. The now infamous video was part of the prosecution's opening statements in the murder trial of Travis and Gregory McMichael and William "Roddie" Bryan. 

Prosecutors said the McMichaels assumed the worst when they spotted Arbery walking out of an open construction site while jogging in the neighborhood.