CAMBRIA, Calif.- Standing on the ridge overlooking her central California farm, new widow Teri McCall sees her husband Jack nearly everywhere. There, atop the highest hill, is where the couple married in 1975- two self-described “hippies’ who knew more about how to surf than farm. And over there, surrounded by the lemon, avocado and orange trees Jack planted, sits the 800-square-foot house the young Vietnam veteran built for his bride and a family that grew to include two sons and a daughter. Solar panels Jack set up in a sun-drenched stretch of grass power the farm’s irrigation system.

And down there, clasped in the cusp of the velvet green valley sits the century-old farmhouse Jack and Teri eventually made their permanent home. Jack installed a stained glass window featuring a heart and flowers over the front door.

“Literally hundreds of times a day, something reminds me of him,” McCall says, as she and a visitor strolled through the orchards on a recent sunny spring morning. “That’s part of why it’s so hard to believe… I can never see him again.”

Anthony ‘Jack’ McCall, 69, died Dec. 26 after a painful and perplexing battle with non-Hodgkin lymphoma. The loss is certain, fixed forever into his family’s heartbreak. But questions about why and how he was stricken – a man who never smoked, stayed fit and had no history of cancer in his family – are part of what some legal experts see as a potential landmark legal claim against one of the world’s largest agrichemical companies, Monsanto Co.

McCall shunned pesticide use on his farm, except for the herbicide called Roundup – marketed by Monsanto as having extremely low toxicity. He used Roundup regularly, spraying it himself around the farm to drive back worrisome weeds. He even recommended Roundup to friends, telling them it was supposed to be much safer than alternatives on the market, and touting its effectiveness.

But now in his death, McCall is one of several plaintiffs in more than a dozen lawsuits that claim the active ingredient in Roundup – a chemical called glyphosate – gave them cancer, and that Monsanto has long known glyphosate poses “significant risks to human health, including a risk of causing cancer.”

The lawsuits, brought by plaintiffs in California, Florida, Missouri, Delaware, Hawaii, and elsewhere over the last several months, claim Monsanto has hidden evidence, and manipulated regulators and the public into believing in the safety of glyphosate, which annually brings in about $5 billion, or a third of total sales, for the agribusiness giant. Like McCall, many farmed, or worked in agricultural jobs in which they regularly were using or exposed to glyphosate.