Investigation
The official investigation that the Moscow City Prosecutor's Office has been carrying out for three and a half years failed to provide positive information on the gas agent that killed hostages, possible antidote to that agent, the number of hostages released by the operation, the number of militants who had seized the theater (hostages claimed that they saw more than 50 militants, whereas only 40 hostage takers were in the building according to the official version), and the names of officials who had made the decision about the assault. On 1 June 2007, news came that the official investigation had been suspended. The reason provided was that the "culprit had not been located".
The same month, Tatiana Karpova, co-chair of the Nord-Ost Organization of former hostages and families of the dead, demanded a new criminal investigation. She claimed the authorities failed to meet their obligations related to right to life. She claimed to have proof that "69 of the injured were given no medical care" and that "80 percent of the surviving hostages are potential future invalids, including future (occurrence of) cancers, (and there is a possibility that) women who were subjected to the gas attack (could) give birth to defective babies". In July 2007, relatives of those who died in the hostage-taking urged the Office of the Prosecutor General of Russia to investigate whether senior officials were responsible for the deaths.
Read more about this topic: Moscow Theater Hostage Crisis