The investigating into a political banner featuring swastikas has concluded.  Southbury officials say police and the town's attorney are not pursuing the investigation any further.  The banner, which showed donkeys wearing swastikas and the phrase “the new logo for the Democratic party,” was placed on Playhouse Corner in late July during a protest rally.  There was no criminal activity or hate crime committed.  No perpetrators were able to be identified.  The Southbury Board of Selectmen unanimously condemned the incident.