World New Zealanders have voluntarily turned in more than 10,000 guns following the mass shooting in Christchurch August 12, 2019 Ryan W. Miller, USA TODAY Comments Off on New Zealanders have voluntarily turned in more than 10,000 guns following the mass shooting in Christchurch More than 10,000 firearms have be turned in as part of an effort to buy back guns following the Christchurch shooting, police said.