The morcellator surgical tool was found to spread uterine cancer, and the FBI is examining what the largest maker of it, Johnson & Johnson, knew about the hazards The FBI is investigating a surgical device that was found to spread cancer in women, including looking into what the largest manufacturer of it, Johnson & Johnson, knew about the tool's hazards before pulling it off the market last year, according to people who have been interviewed by the agency. It is unclear what stage the inquiry is in.