Guns into plowshares

In 1997, a sculpture created by Mennonite artist Esther Augsberger, with the support and assistance of the D.C. Metropolitan Police Department, was dedicated in the city's Judiciary Square.  Intended as a statement against gun violence, it consisted of 3,000 disabled handguns welded onto a  piece of metal shaped as a plowshare.  The piece stood there until a few years ago when it was suddenly moved to a city lot, lying on its side behind a chain fence.  Who moved it and why? No one seems to know.