Kaldin sorry I think your theory is far fetched why would she put it away in the cupboard and why would Jeremy put it away before cleaning it IMO the silencer was not used by the perp.
There's no need to be sorry Susan, I'm just voicing some thoughts.

I agree with what you say generally, although either scenario is possible. I think the presence of the blood in the silencer does indicate that it was used.
Is it also possible that someone else put the silencer away, not thinking that it was signficant?