I said he more-or-less killed him, not that he actually killed him. Care was not taken to ensure he'd be revived or revivable. He was left forgotten in a pocket. The likely outcome was that he remained forgotten and didn't get wet until he'd been dropped under some furniture, crushed like a stock cube or gone mouldy. Maybe he had dependents, like a young child who'd have died without their parent. It being theoretically possible to revive someone later doesn't make turning them into a dehydrated cube meaningfully better than making them dead if you don't have a strong plan with a failsafe to make sure they stop being a cube. Even with guaranteed revival, if they're a cube for long enough that they notice the lost time, it's just like roofying someone and holding them hostage for a while. Do not turn museum guys into dehydrated cubes.