How would I go about detecting an item dropped using an effect?

[NixTer]

Currently, I have this code snippet:

drop 1 of chest named "{@prefix} &c%victim%'s DeathPackage" at event-location

On drop, last dropped item,

on spawn:
    event-entity is an item
    #rest

and further methods have all failed (I know this due to using debug messages and several other ways of testing, all which should have worked if it was being detected).

Any way to detect this type of dropping? If it helps, this is in an On death event and I did use cancel drops but I have tested and confirmed that the chest still drops, so why can't I detect it dropping?

 

[ShdwOrganisatin]

on death:
    clear drops

 

[NixTer]

Thats...not what I'm asking. I already have that.

 

[ShdwOrganisatin]

What do you want then?

 

[NixTer]

I...clearly explained it. I wish to detect the dropping of an item through skript expressions using a different event so I can apply data to it.