From the Washington Post:
In the immediate aftermath of the shooting, which resulted in the death of one security guard, several items were unearthed online that appeared to be written by von Brunn: a piece titled "Obama Is Missing," which questioned the president's citizenship, on conservative forum FreeRepublic.com. A Wikipedia user bio page (von Brunn had edited only sporadically), in which he wrote that Judaism is "the Enemy of Mankind." A long-stagnant personal site, HolyWesternEmpire.org, which included links to a novel.
Throughout Wednesday afternoon, these links began to disappear. Clicking on the personal site resulted in an error message. The Wikipedia user page vanished. The Free Republic link was also removed -- at least for a while. Current events Web site Daily Kos remarked on the removal, and a few hours later, the post reappeared.