i have one word for you, that should explain everything:
smartbombs.
for a more detailed explanation, fit a sentence around these words:
smartbomb, drone complex, cargo-can.
if its your cargo can (and an npc you've just killed counts as your cargo can) it should be fine. i managed to convince the GM that this had happened and hence it was a bug that concord arrived (actually, it pretty much was a bug, as they shouldnt have been able to warp to me as i was in deadspace... ), though i have a feeling what happened was that someone else had been killed there and i'd hit the can they'd left in the midst of all the drones.