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Matt stops a crooked Deputy Sheriff from shooting an unarmed man in the back outside the Dodge jail. The man doesn't want to go back because he says he's innocent and will be hung without a fair trial. Matt holds him in the Dodge jail and tells the Deputy Sheriff to get a legal warrant for the man's arrest.

While the Marshall is out of town for a few hours the Deputy Sheriff tricks Chester into leaving the jail so he can take the prisoner. The prisoner smacks the deputy over the head then believing he's killed him goes off to kill the Sheriff in Mingo.

Matt and Chester go after him. They trail him to a house outside Mingo but the man escapes again and takes Matt and Chester's horses so they must walk 4 hours to get to town.

When they arrive they find the man dead in a cell in the Mingo jail. Shot in the back.

Having heard and seen had enough of the Sheriff's crooked ways, Matt goes to find him and arrest him.