A rather simple concept primarily based on existent VIP and warehouse bag delivery scripts.
Bags can be picked up from a Police Station and need to be transported to a destination. Bag carriers (players) appear on the map and can be killed. Bags, similar to VIP are dropped upon death and can be picked up by criminals. Cops receive reward upon delivery to drop-off point. Criminals receive reward upon picking the bag up (or alternatively, deliver it to a different drop-off point).
Key difference from VIP: Several bags, one per each cop participant. Initiated from the Police Station by the Police team.
As with all scripts, success depends primarily on whether someone will be willing to script it. However I believe that since we already have quite similar scripts, it might be possible to adjust them to fit this concept.