LOS ANGELES, Calif.—The Los Angeles County Board of Supervisors voted July 13 to collaborate with federal, state and local officials to shut down illegal cannabis grow operations in the Antelope Valley, while agreeing to reconsider a longstanding county ban on commercial marijuana. Supervisor Kathryn Barger warned three weeks ago that commercial cannabis and hemp grow operations in her district are using dangerous pesticides, stealing water from fire hydrants and frightening neighbors into silence. However, she failed to get support from her colleagues on a plan of action that included tougher criminal penalties and required four votes to pass. On July 13, Barger asked for support of a substitute motion co-authored by Supervisor Sheila Kuehl that did not include any mention of stricter penalties. It passed unanimously. “Make no mistake, illegal marijuana grows are something that impacts the entire county of Los Angeles. Illegal growers are using unregulated chemicals to process …