I might be able to go with interference.I'll bite: Dead ball. Runner at 2nd obviously out, runner that crossed the plate returns to 3rd. No run scores. Batter on the play at 1st. Umpire gets a bunch of static from one side or the other. Maybe both.
Interference by Retired Player preventing the double play
a) Runner to 2nd already out
b) Interference by retired runner and dead ball
c) Runner closest home is out
d) Batter-Runner awarded 1st
e) Other runners return to last legally occupied base