Duluth, MN (KDAL) - Authorities in Duluth are alerting the community about the relocation of a convicted sex offender. The Duluth Police Department says Dennis James Armstrong is living in the area of 20th Avenue West and Superior Street. The level three predatory offender has a history of sexual contact with boys and girls ages five to seven. The 41 year-old was known to his victims. The white male stands five feet eight inches and weighs 183 pounds. He has a medium build with blue eyes. According to the Minnesota Predatory Offender Registration, there’s a high likelihood that level three offenders will re-offend.