This isn't pure WP:OR (WP:COATRACK fits better I guess; I called it "basically WP:OR" in my edit summary for that reason), but it's essentially OR to suggest that al-Qaeda has something to do with the investigation...even if it's not stated outright. The insertion of that material creates the appearance that al-Qaeda is somehow linked to or related to the investigation, which no sources support. That's what I was calling "basically OR" (even if it indeed isn't quite what WP:OR means; I should've used a different term.) Of course, we do "original research" to create articles and determine notability in the first place, but inserting a random similarity goes beyond the scope of what that research covers. The source may have said the characteristics are similar, but not that it's related to this incident or its investigation. –  (rfc | diff)