A Maryland police chief has been cleared of criminal wrongdoing in the deadly shooting of a man last SeptemberCheverly Police Chief David Morris shot 45-year-old Tesfa Leith seven times as he charged at officers with a pair of knives.Morris was helping a neighboring police department investigate Leith over a stabbing earlier that day.RELATED: Maryland police chief guns down man allegedly armed with knivesThe Maryland Attorney General's Office re…