When Angelika Graswald and Vincent Viafore went kayaking on the Hudson in 2015, Now, after more than two years since the death, the mystery has been solved... As a prime suspect in the case, Graswald finally admitted to killing her fiance, and watching him drown. Prosecutes said Graswald would have received her late fiance's $250,000 life insurance policies, giving her plenty of motive... She faces a four year prison sentence for negligent homicide.