Spokesman : `` The grave is now on a sunny hillside , shaded by an oak tree in an area with room for her children and other family , '' Sunshine said . The Department of Homeland Security (DHS) is working with the U.S. Attorney's Office for the Eastern District of Virginia to investigate a possible threat against our nation's critical infrastructure. A medical examiner ruled Mary Kennedy died of asphyxiation due to hanging . Kennedy family members purchased some 50 plots surrounding the grave .
Spokesman : The Department of Homeland Security (DHS) is working with the U.S. Attorney's Office for the Eastern District of Virginia to investigate a possible threat against our nation's critical infrastructure. A medical examiner ruled Mary Kennedy died of asphyxiation due to hanging . Kennedy family members purchased some 50 plots surrounding the grave .