After being called to a criminal medical center to identify the body, Kalsen's family denied the claims, stating that it was not their daughter.[13] On 8 January 2015, the perpetrator was identified as Diana Ramazova, a Chechen-Russian citizen from Dagestan. Turkish police are investigated Ramazova's possible links to al-Qaeda or the Islamic State of Iraq and the Levant. Further investigation revealed that suspect had photos with insurgents from ISIS.[14][15] The DHKP-C on 8 January removed the statement claiming responsibility from its website without giving any explanation.[16] As of yet, it is not known why they took responsibility for the attack.