People pray at the burial of Natalya Estemirova in Chechnya July 16, 2009. (AP/Musa Sadulayev)
People pray at the burial of Natalya Estemirova in Chechnya July 16, 2009. (AP/Musa Sadulayev)

Three years on, Natalya Estemirova’s murder unsolved