Three of four people indicted for alleged heroin distribution around North Georgia were arraigned Friday, according to court documents. Michelle Dawn Dorsey, 45, of Demorest, Nigel Alan Waddell, 28, of Cornelia, and Tyler Josiah Matthews, 26, of Cleveland, entered not guilty pleas Friday before U.S. Magistrate Judge J. Clay Fuller. The fourth co-defendant, Derrik Omar Frazier, 42, of Stone Mountain, pleaded not guilty on July 20.