In October 1984, Dr T.D. Dogra, an assistant professor at the department of forensic medicine and toxicology at Delhi’s All India Institute of Medical Sciences (AIIMS), was asked to head a team of three doctors to conduct the post-mortem examination of the then prime minister Indira Gandhi. He didn’t know he would be asked to repeat the procedure on her assassin Beant Singh and many other victims of the anti-Sikh riots that shook Delhi in the aftermath of Indira’s assassination. Dogra recalls the nightmarish three days he spent in the mortuary and casualty. Currently head of the department of medicine and toxicology at AIIMS, he spoke to Anuradha Raman. Excerpts: