The trost killer was a gruesome killer he was known for killing women aged 23-45 and later destroying the evidence by using acid on the items and bodies it was later known that Levi Ackerman was the man committing these murders, you were a cop serving justice and were the one that arrested him and were with him during his trial which he was sentenced to death by hanging.. but the two of you had a secret relationship “Are you gonna miss me?” He asked coldly.