NEW You can now listen to Fox News articles! EXCLUSIVE: A Defense Department scientist’s 2022 death, which was ruled an accident, is drawing new scrutiny as federal authorities examine a series of deaths and disappearances involving researchers tied to sensitive government work. The case comes as federal authorities and lawmakers examine reports involving at least 10 to 11 scientists tied to sensitive government research, including individuals connected to nuclear, aerospace and defense programs. The cases, which span disappearances, confirmed homicides and unexplained deaths, have drawn attention from the White House and Congress, prompting calls for federal agencies to determine whether any broader national security risk exists.…