Yavuz Yapıcıoğlu

He was apprehended on December 24, 2002, and the court ordered his mental examination by the legal medicine institute, which certified in April 2003 that Yapıcıoğlu was fully criminally liable for offences he committed. The report stated further that he simulated mental disorder. He was detained in the Tekirdağ Prison.

During his trial in Tekirdağ on December 25, 2002, he admitted that he can normally speak well and do good, but he sometimes experiences loss of feeling time and place. He added that his killings took place during such episodes.

He married, but the marriage lasted only a brief time. He played football on his school's team and later for an amateur league club. He started a business in the leather trade but was unsuccessful. Sometime before 1994, he joined a religious cult in Merter, Istanbul. Since he had no income, he lived with his brother.

Yapıcıoğlu committed his crimes apparently with little cause. In 1994, he stabbed three people to death after one of them wished him good morning. The 20-year-old Sait Korkmaz died at the scene. Yapıcıoğlu then tried to escape, hijacking a car and killing the driver, Rasim Aydın. Yapıcıoğlu was apprehended in Avcılar. He was placed in Bakırköy Psychiatric Hospital, where he assaulted his roommates and the nurses, and set his ward on fire. He was released due a medical report attesting diminished responsibility.

Yavuz Yapıcıoğlu (born 1967) is a Turkish serial killer and arsonist nicknamed "The Screwdriver Killer". He is considered the most prolific serial killer in Turkish history, being responsible for the deaths of 18 people between 1994 and 2002 according to police records, or as many as 40 according to eyewitnesses and his relatives.

Yavuz Yapıcıoğlu was born in Adana in 1967. He has nine siblings. He claimed his family was unloving. His father married a woman with whom he had an affair, and he was raised by his stepmother. He finished primary and middle school at the top of the class. He was well liked by his classmates. He left home and dropped out of high school in the tenth grade after a quarrel with his parents.