The investigation is underway for who set fire this week to the law office of an eviction attorney on Smith street in North Providence. Several violent activist groups have been protesting outside the Garrahy courthouse in Providence and threatening any attorneys connected to evictions. It was set with an explosive device in the back of the building. A sign was found in the bushes that is often see outside the courthouse. Police believe they know who they are looking for. Developing. (Media must credit John DePetro Show for video use.)