Rewards are tricky, the notes are invisibly marked and as people pay with bank cards, a note of 500 euros is examined before being accepted.
Let's assume the 3 burglars each told their mothers/lovers/wives/buddies about who they had in the back shed. Some may have confided in a couple of people over the years.
That's at least 3 other people, who know. 3 other people who may or may not still be friendly with their particular burglar, 7 years down the track. Would they not attempt to claim the reward?
So far, no one exists. Euclides widow has outright defended him and rejected any suggestion of his guilt, even though they were divorced, so she's ruled out.
As far as the other two, well they could be on their second partner/lover/cellmate by now, so where are they?
And on and on...
IF a successful abduction was staged by a "team", there are people who have knowledge of it, who would be able to safely come to LE and eventually claim the reward.
Where are the other 2+ who know about this "crime"?