Yolo County officials have now released their determination for what killed the seven people in July's Esparto fireworks facility explosion.

California's top prosecutor is choosing not to co-lead an investigation into what caused a series of fireworks explosions that killed seven people in the Esparto area of Yolo County.

Seven were killed in a blast on a deputy’s property. The AG says Cal Fire and Yolo County’s D.A. can handle it.