the orange county district attorney 's office said thursday that 35-year-old angelika graswald , of poughkeepsie , is charged with second-degree murder in the death of 46-year-old vincent viafore .
troopers have said viafore , also of poughkeepsie , was kayaking with graswald on the hudson river april 19 when his vessel flipped over near the town of cornwall-on-hudson .
police have yet to find viafore 's body .