I'd much prefer a working evidence locker system that FBI could use in future for busts though, but let's not give axxo even more work 
Well if we have an evidence locker then anything that can be packed into a briefcase can be put in it.
This would be a cool addition, and maybe there could be a small option to include a description for any evidence you store.
That way, when the next person examines the evidence it would give them a 'file' detailing the origin of the weapons/drugs/other seized items, the incident and possibly suspect names.
Would encourage multiple people to work together and cooperate to get to the bottom of a case.