At the time of airing, it was explicitly confirmed by producers that it was Sara Tancredi's head . The actress, Sarah Wayne Callies, was reportedly unable to reach an agreement for a new contract, and her character was written out in this gruesome fashion.
The confirmation that the head in the box belongs to Sarah would have profound implications for her family, friends, and the community at large. The emotional and psychological impact on those close to Sarah would be devastating, necessitating support from counseling services. was it sarah's head in the box