Her son, Joel "Junior" Melendez, 28, was killed in the blast. Lupe said her strong words are directed at the fireworks company that employed her son and also at county and state officials, who have provided limited information in the investigation. Lupe wants her son to be remembered as a great father, brother and friend.

Cal Fire's state fire marshal was leading the investigation at the Inner Richmond home on 2nd Avenue, between Geary Boulevard and Anza Street, a Yolo County spokesperson said.