Investigation into VTA mass shooting continues; state, local officials mourn

Local, state and federal authorities continue to investigate suspected explosive materials in the wake of a Wednesday morning shooting by a South Bay transit employee who killed eight people and himself at a light rail yard in San Jose.

Investigators, law enforcement officials and political leaders held a briefing Wednesday afternoon to shed more light on the shooting by a Santa Clara Valley Transportation Authority employee identified by various media outlets as Samuel Cassidy, 57.