Without getting into details, I've dealt with many, many families of people who have been missing and presumed dead, whether by foul play or other means. I can very, very, VERY conclusively say that families in that situation are in absolute torment that never ends, far worse than if they have confirmation of their loved one's fate and a chance to properly lay their remains to rest. It's not even that they keep hoping -- eventually, for most, the hope does end. But not knowing where your loved one's remains are is absolute agony. If they know their loved one is dead, they can begin and follow the grief process. It's still awful but the not knowing is worse in every single case I've dealt with. I've known families who have spent decades searching for what happened to their loved one, and it's a horrible process to watch. They can never really move forward.