These details don’t clear much up about the firearms used. My theory is they were all owned by the mother. She either aquired more since the guns were returned or the police never got all the guns the first time they were siezed, very possible given there is no real registry and the soft registries are incomplete. The investigation is on going of course but I wouldn’t be surprised if police keep these details muddy to prevent more questions about the confiscations and subsequent return of firearms.