>(Why Raylan would think Picker who'd been holed up
>and had little connection to the Harlan stuff would know
>anything is a little problematic.)

Well, he was already aware of Picker's association with Duffy and Boyd (and in turn suspicious of Boyd's association with the Crowes) prior to this episode, so it's not that far-fetched that he would think Picker may have a heard a thing or two about Art's shooting from the local big shot criminals.