THis just occurred to me based on your post. Maybe they faked his death to put him into witness protection. He was supposed to be about to go see the FBI. Maybe they saw him first. Probably deaded though.
I think almost anything is possible.
Arguments for: It makes a LOT of sense. He was stable in the hospital. His family acted strangely in the video. (because they knew he was alive?) ... more
Arguments against: DC is run by derps and derps showed up in the hospital immediately. Derps wanted him dead. His family acted strangely in the video (because they were threatened or because the brother was guilty?) ... more
So which is more plausible?