ANALYSIS: 3D-printed ‘ghost guns’ have become increasingly in demand by criminal groups, partly because of the belief that such weapons are untraceable; but new research by Dr Georgina Sauzier and PhD candidate Michale Vic Adamos of Western Australia’s Curtin University suggests that chemical analysis of the filaments used to print the guns could help forensic investigators and police to link a seized gun and seized filament, or guns seized from different cases.