You're probably thinking of Monsanto Canada Inc v Schmeiser where Monsanto sued a farmer who claimed that the seeds had just drifted onto his field. Monsanto w

You're probably thinking of Monsanto Canada Inc v Schmeiser where Monsanto sued a farmer who claimed that the seeds had just drifted onto his field. Monsanto won the suit because they demonstrated that the seeds didn't just drift there by accident: he knew what they were, and he went out of his way to plant them. He intentionally concentrated the seeds and planted them for a new crop in commercial levels. Of course the sensationalist media had to treat Schmeiser's defense as gospel, but here's a quote covering the ruling: > "The court record shows, however, that it was not just a few seeds from a passing truck, but that Mr Schmeiser was growing a crop of 95–98% pure Roundup Ready plants, a commercial level of purity far higher than one would expect from inadvertent or accidental presence. The judge could not account for how a few wayward seeds or pollen grains could come to dominate hundreds of acres without Mr Schmeiser’s active participation, saying ‘...none of the suggested sources could reasonably explain the concentration or extent of Roundup Ready canola of a commercial quality evident from the results of tests on Schmeiser’s crop’" https://en.wikipedia.org/wiki/Monsanto_legal_cases https://en.wikipedia.org/wiki/Monsanto_legal_cases https://en.wikipedia.org/wiki/Monsanto_Canada_Inc._v._Schmeiser https://en.wikipedia.org/wiki/Monsanto_Canada_Inc._v._Schmei...