Commerce 40/80 - An LC hand and a question

[Rumbles]

He is indeed obligated to show his hand first, and regardless what he says, you will need to show both cards to win the pot.

HOWEVER, if he releases his hand (with a clear intention to fold), congratulations, you've just won the pot. You can zing your cards into the muck with impunity, because the dealer will award the pot to the last player with cards.