Windom Starkiller says, "Blix Lanister's crew busted him out and left town. I have people out tracking Blix, but you seem to have a knack for finding him and his cohorts. Do you think you can find him again?"

Windom Starkiller says, "Lanister may not let you bring him back alive. Do what you have to do."

After Killing Blix and his gang return for your reward...

Windom has no more missions for you after this point.