Seibo No Kyohan Sha Keishicho 53 Kyojo (Kadokawa Bunko)

[Machine Translation] A female inmate serving time for the manslaughter of her own child escaped from the Fuchu Police Station during transportation. The next day, an unprecedented stand-in occurred at a police academy in the midst of a graduation ceremony, taking an assistant instructor and students hostage. The culprit is a man who married a female prisoner in prison, and he demands to find out the real culprit of the incident she is said to have caused. Ayano, a detective at the same police station, and Gomi, a former Metropolitan Police Department detective and instructor at the police academy, set out to get to the bottom of the matter. Soon, the existence of another collaborator comes to light. This is the third installment of the popular series.

実子に対する過失致死で服役中だった女性受刑者が移送中に府中警察署内から脱走。翌日、卒業式真っ只中の警察学校で、助教官と学生を人質にとった前代未聞の立てこもりが発生した。犯人は女囚と獄中結婚をした男で、彼女が起こしたとされる事件の真犯人を突き止めよ、と要求。同署刑事の綾乃と、元警視庁刑事で警察学校の教官・五味が真相究明に乗りだした。やがて別の協力者の存在も明らかになり―。人気シリーズ第3弾。