Mike Zullo, the lead investigator in Arizona Sheriff Joe Arpaio’s investigation of Barack Obama’s eligibility to be president, says he has returned from a second trip to Hawaii with additional evidence the state’s Department of Health is maintaining a cover-up of Obama’s 1961 birth records. When Arpaio dispatched Zullo for the second trip, the assignment was kept confidential for Zullo’s safety and to prevent media links. Only Arpaio and the chief deputy of the Maricopa County Sheriff’s Office were aware of the assignment. Zullo worked closely with local contacts, including Duncan Sunahara, the brother of Virginia Sunahara, an infant child...