COTTER -- Cotter Police Chief Joe Robison resigned Tuesday, Mayor Mo Mosley said. "It was more than he was willing to contend with," Mosley said. Mosley asked Robison to take a drug test; and after Robison consulted with his attorney, he declined to take the drug test and resigned, Mosley said. Robison could not be reached for comment Tuesday. Mosley, who was contacted after business hours, said The Baxter Bulletin could receive a copy of the resignation letter Wednesday. Robison was hired as Cotter police chief April 17. [continues 111 words]