Committee investigators were intrigued by Sierra’s unsavory connections, including to three sketchy characters who showed up with Lee Harvey Oswald at the Dallas home of Silvia Odio, the daughter of a prominent anti-Castro activist, in September 1963. But, in the end, lacking the time and resources to fully pursue its leads, the congressional panel was forced to acknowledge that the “relevance to the assassination” of Sierra’s activities “remained undetermined.”