Mims said her department is working with Cal Fire and the FBI on solving the Harris arson case, and she also used the symposium to warn growers about the growing of marijuana on farmland on the Valley floor.

“We will prosecute and your property can be seized,” she said.

Mims said trafficking in marijuana has been boosted by what she called “convoluted state medical marijuana laws.”

“It’s not about medicine, it’s about the money,” she said, pointing out that a single acre of marijuana can result in sales valued at $19 million.

Mims said the largest “marijuana grow” her department has hit was a 54-acre field outside of Sanger where plants were 12 to 13 feet tall.

She said her deputies have traced movement of marijuana to states well outside of California — “Texas, Arkansas, Tennessee, Utah, Massachusetts.”

The Valley pot business also poses physical threats to the innocent, Mims said, showing slides of a gun turret overlooking one growing area in Fresno County and a booby-trap placed in another in Kern County, using some fish line, a rat trap and a shotgun shell.

(For more on California marijuana farming, see: California’s growing marijuana business impacting agriculture)