Spot the donkey

[igycrctl]

I've been reading the forums for a short time, so if I offend anyone, please excuse me. The following occured at a home game I play in. Please help me "Spot the Donkey". Thanks.

No-Limit Hold 'Em
Four players:
Player 1 (sb) with 150BB.
Player 2 (bb) with 50BB.
Player 3 with 40BB.
Player 4 with 100BB.

Pre-Flop
Player 3 calls bb. Player 4 raises to 4BB. Player 1 calls. Player 2
calls. Player 3 calls.

Flop
Flop comes: K♦ 8♣ 2♦.

Player 1 bets 24BB. Player 2 calls. Player 3 folds. Player 4 raises
all-in. Player 1 calls. Player 2 calls.

Player 1 turns over K♣ 2♣.
Player 2 turns over K♠ J♣.
Player 4 turns over K♥ J♦.

Turn
Turn comes: 9♦.

River
River comes: Q♦.

Background
Players knew that this was going to be the last hand of the night so
there was a decent amount of gamble in the air. Player 1 was up about
70BB, player 2 was down about 50BB, player 3 was down about 20BB, and
player 4 was up about 60BB.