A couple of thoughts, from a non-competitive fisherman.
Nope. Can't prove that they cheated before. Impossible. If they were allowed to fish tournaments going forward however, it would be interesting to see how their numbers would stack up against their competitors. I bet if they were forced to be squeaky clean, they wouldn't be winning as often as they have in the past.
Nope. They can't prove that this was their first time cheating. Someone else said it. They were pretty brazen and blatant about it. I mean, they stuffed nearly 8 lbs down the throats of 5 fish. I bet they took their sweet ol time working up to the point at which they were caught.
Also, a question. What was the point of stuffing some whole fillets down the throats of the fish? I get that a fillet wouldn't show up on a metal detector, or maybe not on an xray, but why fillets AND lead?
Can't quite figure that one...
Jaykay