It is known that at least two different weapons were used in these shootings, possibly as many as three. As a result, what may have been done is that during the 'wholesale substitution' process of brass cartridge cases, so that police could present the investigation as a one gun crime, that all the 'type 3' brass cartridge cases which were originally taken from the scene were 'systematically removed' because each of these contained 'evidence' of a 'firing pin mark, distinctive to a different weapon, not including the anshuzt rifle...