Dr. Michael Hirsh speaks at a press conference at the Mercantile Center Thursday about the Guns 2 Gardens gun buyback program he founded in Worcester in 2002. Mayor Joseph Petty stands behind him (photo by Bill Doyle)

Dr. Michael Hirsh speaks at a press conference at the Mercantile Center Thursday about the Guns 2 Gardens gun buyback program he founded in Worcester in 2002. Mayor Joseph Petty stands behind him (photo by Bill Doyle)