Duluth, MN (KDAL) - With the approval of the U-S Marshals Service, City of Duluth workers were cleaning up the inside and outside of The Last Place on Earth this week. The shuttered store’s owner has been convicted of 51 federal counts for selling misbranded, synthetic drugs. He faces a possible prison term of 20 to 40 years. Crews removed the large "Last Place On Earth" sign from the front of the building and several other signs in the upper floor windows on Thursday morning. City of Duluth spokesman Daniel Fanning says the goal of the symbolic move is to beautify the area and address the concerns of neighbors. Through the legal proceedings against Carlson, the building remains under the control of federal Marshals.