Police find images of Hitler and 'extremely graphic' videos of previous mass killings on Jonathan Douglas Sapirman's device

Police say gunman spent hour in bathroom, possibly assembling rifle, before firing on shoppers, killing three; 'Good Samaritan' praised for using lethal fire to take out shooter

Police say incident in which two were wounded not believed to be religiously motivated or a hate crime; community center says it's reviewing its entry policies

Four others hospitalized, one with critical injuries; police say the gunman is dead; motive unclear

Dozens more have been injured during incidents related to unrest following death of George Floyd; tens of thousands have marched peacefully against police brutality and racism

Leaflets described as 'anti-Semitic in nature;' police classify incident as a 'bias crime' and tighten security at sites