I also had this problem on PS4. So, I reloaded the game and it was still gone. I went to go see if maybe this time it was back in my inventory by seeing if I could sabotage the body, and the body was gone too.
This game is a generally good game, I enjoy playing it, and for the most part glitches are small and easy to ignore. However, this glitch prevents the game from continuing. I'd load a save from before this, however it would take me a lot further back in the game than I'd like.
If possible, please fix this, because unlike pc, console players can't type in commands to spawn items.