The plaintiff's opening argument focusing on choice --- attorney Brent Wisner telling the jury Monsanto took away his client's ability to choose by not disclosing the potential dangers of Roundup weed killer.
RELATED: Judge hears case about Roundup ingredient alleged to cause cancer
"If you don't give someone a choice and somebody gets hurt or, God forbid, gets cancer, then I personally believe and I think you will as well that you should be responsible for the consequences of that," Wisner said.
Dewayne Lee Johnson worked for Benicia School District in 2012, becoming the integrative pest manager.
Wisner says a large part of Johnson's job was to spray Roundup -- often 50 to 60 gallons at a time.
After two years, Johnson developed lesions on his body -- later diagnosed as Non-Hodgkins Lymphoma.
Attorney for plaintiff in first of hundreds of cases against Monsanto alleging Roundup weed killer causes cancer talks about emotion behind case knowing his client is on "borrowed time." pic.twitter.com/dHBt2BGpVh— Melanie Woodrow (@MelanieWoodrow) July 9, 2018
The defense says Johnson's cancer developed long before he used Roundup.
"The scientific evidence is overwhelming that Glyphosate-based products do not cause cancer and did not cause Mr. Johnson's cancer," said Monsanto's defense attorney, George Lombardi.
Johnson's attorneys say Monsanto didn't disclose important scientific research, even after Johnson called twice to ask Monsanto if it was possible Roundup caused his cancer.
"I don't think it's a surprise that after 20 years, Monsanto has known about the cancer-causing properties of this chemical and has tried to stop the public from knowing it," said Robert F. Kennedy Jr.
"The single most relevant study, best study, study of human beings who, like Mr. Johnson, are licensed pesticide applicators concluded glyphosate is not associated with Non-Hodgkin's lymphoma, Mr. Johnson's cancer," said Lombardi.
Johnson is expected to testify. His attorneys have not specified the damages they are seeking.
This is expected to be a precedent setting case. Mr. Johnson's attorneys saying they have hundreds, if not thousands, more clients in the pipeline who have developed Non-Hodgkins lymphoma from exposure to Roundup.
.@RobertKennedyJr "I don't think it's a surprise that after 20 years @MonsantoCo has known about the cancer causing properties of this chemical and has tried to stop the public from knowing it." #Roundup trial underway @abc7newsbayarea pic.twitter.com/BZjVSxv2PX— Melanie Woodrow (@MelanieWoodrow) July 9, 2018