[6][7] Prosecutors wanted a death penalty and she was retried by the Supreme Court in May 2024, which upheld the conviction of life sentence.
[13] With plenty of free time, Jung developed a hobby of watching crime shows and reading murder stories.
Then, in late May 2023, she found a willing tutor, a 26-year-old freelance worker and a university student, who was living in the south-eastern area of Busan.
[9] Footage on a security camera showed that after the kill, she first went back to her home to bring a black trolley suitcase.
[19] She took a taxi and dumped the suitcase with its contents in a secluded forest near Nakdong River in Yangsan, South Gyeongsang Province.
[9] In the court, her motive was described as rooted on "a feeling of resentment and anger toward her family, helplessness due to continued failures such as college entrance and employment.
"[17] She pleaded for a mild sentence claiming that hallucinations and a host of mental health issues compelled her to kill.
[14] Phone call record played in the court indicated that Jung had given death threats to her father a few days before the murder.
[17] The presiding judge Kim Tae-eob ruled that Jung had no mental illness that prompted the murder as she claimed, and that her act was a carefully planned and executed ordeal.
[14][18] Her apologies and lawyers's plea for reduced sentence were denied, and the court decided that the crime was a deliberate and premeditated act.
According to the court, the judgement was based on circumstantial factors such as the offender's age, behaviour, background and motive for the murder.
[4] Lee further suggested that the main motive could be that Jung wanted to steal the victim's identity in the light of her taking the ID card and wallet, based on her failure to get university enrolment.