With his condition rapidly deteriorating, Takuboku tasks Kyousuke with tailing a suspicious man they saw at the church. Takuboku is certain that a single criminal, Accuser X, is the true culprit behind the string of crimes involving accusatory letters which have exposed various social issues. Who is Accuser X, and what is that person's true objective?
has them write accusatory 
letters, then kills them.
جعلهم يكتبون رسائلَ اتِّهاميّة ثمّ قتلهم
hat seine Opfer Anklageschreiben
schreiben lassen und sie dann getötet.
hace que sus víctimas
escriban una carta.
hace que sus víctimas
escriban una carta.
fait écrire une lettre
aux victimes avant de les tuer,
abbia fatto scrivere alle vittime
l'atto di accusa, le abbia uccise
os obriga a escrever as cartas e os mata.
заставлял их писать 
обвинительные письма, а потом убивал.