In news reports this week, the National Rifle Association’s outside counsel, William A. Brewer III, has insisted that “not a cent” of the nonprofit’s money was “ultimately spent” on a plan to buy a multimillion-dollar Dallas mansion for top executive Wayne LaPierre. But a document obtained by ProPublica shows that NRA money was used to help facilitate the purchase of a 10,000-square-foot Texas mansion for LaPierre, setting off alarms within the nonprofit.