Maryland’s Nathaniel Owens, who just pleaded guilty to charges of ripping off a high-end outlet in Massachusetts that could net him 10 years in prison, found out that thieving isn’t very Gucci. Federal prosecutors say that Owens, 33, is part of a Washington D.C. crew responsible for a series of east coast thefts from luxury brand stores that drew the attention of the FBI. Owens is the second person of that group to plead guilty in federal court …