The builders of KV9 broke into KV12 whilst excavating that tomb. During the excavation, rumors of the second tomb had circulated throughout the camp, however, leading scientists dismissed the idea and continued on. Little did they realize the mistake that was about to be made. The tomb diggers broke though the ground into the tomb only to find the remains of multiple family members in the new tomb. Researchers are still working on identifying the family members and collecting the other artifacts in the tomb.
Isometric, plan and elevation images of KV12 taken from a 3d model