DULUTH, MN (KDAL) - Duluth Police and investigators with the Lake Superior Drug and Violent Crime Task Force arrested four people as part of an ongoing heroin trafficking investigation. The four were taken into custody at a residence in the 2800 block of West 2nd Street. Arrested were Minneapolis resident 22 year old Devon Williams for 2nd degree sale of heroin, 36 year old Demetrius Durant, also from Minneapolis, on a Hennepin County warrant. 24 year old Roland Maynard and 37 year old Ida Coyle, both from Duluth, were arrested on outstanding warrants. All four are now in the St. Louis County Jail.