Why would the doctors lie and say he died? Why would he lie to the world?

After his arrest, Yamagami told investigators that he was dissatisfied with Abe and intended to kill him.[52][53][54] Yamagami also claimed that he held a grudge against a "particular religious group" and shot Abe because he believed that "the religious group and Abe were connected".[55][56][57] The Nara Prefectural Police refused to elaborate on what the "religious group" was.[58] Yamagami claimed that he "didn't have a grudge against Abe's political beliefs".[55] Yamagami told police that he kept track of Abe's schedule during his visit to Nara on Abe's website.[57] Yamagami also claimed that he was planning an attack for "several months" and built a gun to kill Abe.[59][60]

This sounds like MK Ultra brainwashing

Why would the doctors lie and say he died? Why would he lie to the world?