Arthur becomes a victim of the violent force led by Larkin.
After Arthur kills one of Larkin's men, Larkin's men hang Arthur while Cobb is away.
Whittier's passive observation links him directly to Arthur's death and its aftermath.
Whittier is described as an apathetic shopkeeper who witnesses Arthur's hanging.
Arthur provides Cobb with the only local assistance against Larkin's group.
The plot states that Arthur is the only person in town willing to help Cobb.
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