The information in the article posted by the person you're responding to answers your questions - J&J knew their product had high levels of asbestos and hid it from regulators while doing nothing about it. There absolutely was evidence of this, if you would read any of the information posted above. If I sold you a bottle of water with enough asbestos in it to give you cancer, knew about it, and didn't tell you: that would be illegal - it is pretty straightforward.