After the 1980 Turkish coup, he was arrested and sentenced to 16 years in prison for his role in shootings, bombings, and a murder.
1 on May 20, 1979 on allegations of his involvement in killing and wounding persons and various bombings in Şişli and Gültepe in İstanbul.
During the period he served in Metris Prison in Istanbul, he handed in a petition on April 24, 1988, requesting to benefit from the Repentance Law.
[1] On August 28, 1996, while he was sitting in a cafe in the Bebek neighborhood of Istanbul with Celal Babür and Ferda Temel (the police officers in charge of protecting Prime Minister Tansu Çiller), he was targeted by assassins arriving by car.
Ağansoy was shot dead along with Babür in an attack carried out by hitmen hired by Alaattin Çakıcı.