~Case solved~
Enough details have been uncovered and brought into connection to declare this case as solved
A group of people pirates were stranded in the ocean, and made an agreement to cut off one person's arm and eat it in order to survive without having to kill anyone. The two-armed person got out of his end of the deal somehow (most likely from the group being rescued), and was later asked to send it. He managed to remove someone else's arm instead, and sent that to avoid losing his own arm.
YES The logic behind the case is complete in this answer, I will use my card-version for the solution though.A long time ago the four pirates, yarrr~ men drifted on a treetrunk on the sea in a hopeless situation.
Their ship has sunk, they had no food.
So they agreed that everyone had to sacrifice an arm.
Before it was the fourth man's turn however, they were rescued.
The other three reminded him of his promise and claimed one of his arms.
Since the fourth man lived far away from them, he didn't even think of keeping the promise.
He offered whoever was ready to lend him a hand arm one million Euro.
Soon a volunteer was found, the arm was severed and sent to the other three men, who believed it was the arm of the fourth one.
This one was quite a mean riddle, eh?
I enjoyed watching your struggles, and they payed off nicely in the end.
Also, this riddle made for a lot of interesting and fun questions.
So, which one next....
Hmmm, how about...
Ah, yes, that's a nice one, I'm sure you'll like it, my dear players.
Twentyeighth Case: Flickering
When the light flickered, Stephen knew he came too late.