In a statement, Cal Fire said its Office of the State Fire Marshal has determined through its administrative investigation that Kenneth Chee and Craig Cutright and their respective companies violated firework laws and regulations. Chee owns Devastating Pyrotechnics, Inc., and Cutright owns Blackstar Fireworks.

Friday, Cal Fire's Office of the State Fire Marshal announced that they had revoked the pyrotechnics licenses of Kenneth Chee and Craig Cutright – two people whose companies, Devastating Pyrotechnics Inc. and Blackstar Fireworks, are being investigated after the explosion.

In the wake of a deadly fireworks explosion that killed seven people in Esparto, Cal Fire on Friday permanently revoked the state licenses of both companies operating at the blast site, citing multiple violations and escalating its criminal investigation.