Not just for verifying facts in your case, may need to review materials from other disciplines.
Think about "Who else cares about/is impacted by/tracks this topic?" and locate materials for that discipline
Examples:
- Need to verify that the treatment used in medical malpractice meets the standard of care for that medical specialty
- Construction case - question as to whether the plastic piping used in the plumbing was up to code or improper for this type of building
- National industry codes
- Local city/county ordinances
- Review construction industry news to flag issues with the current standards
- Shareholder suit claiming Board of Directors lacked requisite expertise to advise the company
- Research employment history of board members
- Research company bylaws and Articles of Incorporation to see what procedures they have established for choosing board members and educating them as needed
- Review board membership of competitors
- Review business journals for articles on qualifications for board members in a particular industry
Many others - look to subject guides from other disciplines to help you find resources