For his drawings and paintings Hans Defer draws from a visual archive of photographs, using sources as various as magazines, newspapers, books, internet, and private snapshots. His works don't carry a title but instead have a catalogue number from a system he himself has developed, so no interpretation is imposed upon the viewer. Images that are linked to a context of crime and violence are presented next to more banal images. It is through the act of observation that the former contaminates the latter, subconsciously turning them into potential crime scene locations. His fascination for crime scene photography results in 2016 in 'Amnesia'; an installation about the Gang of Nivelles, Belgium's most famous cold case. Between 1990 and 2009, Hans Defer has produced nothing.