TK-421 was the call number of the Stormtrooper that was sent on the Millenium Falcon to investigate it once it was captured in the Death Star 1's tractor beam following their jump to the Alderaan system. TK-421 and another Trooper entered the Falcon, were ambushed, and Han and Luke emerged wearing their armor.

So, clearly their bodies would not be dragged off the ship because that would draw attention. So we can assume that their bodies (alive or dead) left the Death Star with the Rebels and brought (assuming they weren't jettisoned into deep space) to Yavin 4...

Is there any evidence (Legends or Canon) that details his fate or that deals with the whereabouts of these Stormtroopers?