Jordan Lion is a side mission character found in Walker River. He asks for you to kill 125 infected on the side of the river he is found on (southern) and to find a fishing rod (which can be dropped by infecteds) in sake of your avatar "scaring the fish".
As you approach he says: "Be quiet! You'll scare fishes!"
Alongside the east side of the river east of the main bridge (near the end of the river).