Switzerland's twin financial centres, Geneva and Zurich, have done well in their specialities of private banking, wealth management and, in Zurich, insurance.
No one yet knows what made Derrick Bird attack these people, who seem to have included his twin brother and colleagues from work as well as total strangers, before killing himself.
This digitised "twin" might be able to provide valuable lessons for your great-grandchildren - as well as giving them a good idea of what their ancestor was like.