There is more criticism for the fireworks company at the center of the criminal investigation, Devastating Pyrotechnics — this time from a leader in the national fireworks industry.

Business records also show that Kenneth Chee is the owner of the business at the San Francisco property. Chee, the 48-year-old CEO of the company, was denied a license from the Bureau of Alcohol, Tobacco, Firearms and Explosives to possess fireworks and had a history of firearm convictions, the San Francisco Chronicle reported.

As the investigation into last week’s fatal explosion in Yolo County continues, a fireworks industry representative and Cal Fire advisory committee member says there’s work to be done.

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.

Officials searched a San Francisco home registered as the address for Devastating Pyrotechnics' CEO. Seven died in an explosion at the company's warehouse in Yolo County last week.

A 22-year-old man died a week after a fireworks explosion in Pushmataha County left several people critically injured.

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.

A man was killed in a Los Angeles home following a massive fire that investigators say was caused by commercial-grade fireworks.

Family members are still desperate for answers nine days after an explosion at a fireworks warehouse in Esparto killed seven people. It happened on July 1. The blast burned 80 acres, destroyed buildings and forced evacuations.