[2] In Lee's testimony to the U.S. Senate[3] and in her prison memoir Eyes of the Tailless Animals (published in 1999) she recounted witnessing two instances of lethal human experimentation.
[1][10] After the people undergo medical checks, the chambers are sealed and poison is injected through a tube, while scientists observe from above through glass.
[5] A press conference in Pyongyang, organized by North Korean authorities, denounced the allegations and claimed that the corroborating documents had been forged.
[11][12] Shin Eon-sang, South Korea's Assistant Minister for Unification Policy, stated that "[t]he authenticity of the evidence is difficult to assess" because North Korean defectors' "claims are in most cases exaggerated.
"[5] Kwon's account was also questioned by the Yonhap News Agency based in South Korea, which argued he had never served in a political prison and had no access to the information he claimed.