Five people have been arrested in and around Santa Rosa for trafficking fentanyl. Last month, Santa Rosa police began an investigation into a possible drug trafficking ring which included residents from Santa Rosa, Windsor, Graton, and Rohnert Park. Monday afternoon, police served search warrants and found about 1200 suspected fentanyl pills made to look like Oxycodone. Fentanyl is 100 times more potent than morphine and 50 times more potent than heroin. Also found in the searches were about three-thousand dollars in cash and a .38 special revolver.