U.S. prosecutors are preparing what would be the first criminal charges against BP…staff after the worst U.S. oil spill last year, the Wall Street Journal reported...Prosecutors are focusing on whether some BP employees…provided false information to regulators about the risks linked to the drilling of the Macondo well in the Gulf of Mexico…Scott Dean, a spokesman for BP in Chicago, and David Nicholas, a London-based spokesman for the company, declined to comment on the report.