However, the DHKP/C denies any involvement in extortion and it is not unknown for criminal gangs to use the name of the DHKP/C and other armed political groups as a cover for their activities without any authorization from or actual connection to those organizations. On 13 August 1991, Andrew Blake, the head of British Commercial Union in Istanbul, was killed in a shooting. His killing was claimed by DHKP/C. However, the Turkish wing of Islamic Jihad also claimed the killing as their work. Dev Sol also claimed the assassinations of Hiram Abas (1990), Memduh Ünlütürk, İsmail Selen, Adnan Ersöz and Hulusi Sayın (1991) and Kemal Kayacan (1992)—all retired figures of Turkish military or intelligence. In its next significant act as DHKP/C on 9 January 1996, it assassinated Özdemir Sabancı, a prominent Turkish businessman, and two others: an associate Haluk Görgün and a secretary Nilgün Hasefe. The murders were carried out by hired assassins who had been given access to the Sabanci Towers by a member, the student Fehriye Erdal, working there at that time. DHKP/C later claimed responsibility for the act. DHKP/C added suicide bombings to its operations in 2001, with attacks against Turkish police in January and September of that year. On 10 September 2001, a suicide bomber killed himself and three other people in Istanbul, being the bloodiest attack perpetrated by the group. Security operations in Turkey and elsewhere have weakened the group, however. DHKP-C did not conduct any major attacks in 2003, although a DHKP/C female suicide bomber Sengul Akkurt's explosive belt detonated by accident on 20 May 2003 in Ankara, in a restroom, while she was preparing for an action. On 24 July 2004, another mistaken detonation, on a bus in Istanbul, occurred, killing Semiran Polat of DHKP-C and three more people and injuring 15 others. On 1 July 2005, Eyüp Beyaz of DHKP-C was killed in Ankara in an attempted suicide bombing attack on the ministry of justice. In late February 2006, female member Fehriye Erdal was convicted in Belgium, while under house arrest. However, shortly before her conviction she escaped and still has not been found. On 29 April 2009, Didem Akman of DHKP-C was wounded in her attempt to assassinate Hikmet Sami Türk at Bilkent University right before a lecture in Constitution Law.