Ok, so picture this.
You and a teammate are coming up on an enemy and you begin to drain his shields to the point where they are empty.
But before you are able to drain his life, he sticks you! Now your mate drains his shields and avenges you. Post-mortem, but pre-respawn, you receive an Assist medal!
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Now, here is the idea: Say you get an Assist after death. Instead of getting an Assist, you get a Martyr; the Martyr medal is a sort of combo between Kill from the Grave and Assist.
I'll insert more info if required.
Feedback appreciated!