this is part of the demize of night tournaments from most i have talked too.
how easy would it have been for someone to get that stringer at 10pm at night and put the fish in the livewell.people fish there all time so it would not have been suspect.therefore most say they'd rather fish in the daylight.
as far as polygraph passing if someone has the nerves to cheat and bring those fish to weigh in they have the nerves to pass the polygraph.there is someone who i saw pass a few,but when confronted after fishy things going on i havn't seen them at a tournament around here since,if cheating wasn't going on why would they leave when the heat was turned up?