- Four students were killed and several others injured during a shooting at Oxford High School last year.
- At a Tuesday hearing, prosecutors shared new details from the suspect's journal entries and text messages.
- Prosecutors say the suspect enjoyed killing baby birds, citing his journal entries and text messages.
The suspect in the Oxford High School shooting devised a detailed scheme to "stalk, rape, torture, and ultimately kill a female classmate," an Oakland County prosecutor argued at a hearing on Tuesday, citing a personal journal and text messages.
The 15-year-old is accused of killing four Oxford High School students and injuring seven others, including a teacher. He pleaded not guilty to 24 charges — including first-degree murder and a terrorism-related charge.
In the Tuesday hearing, the suspect's attorneys argued that he should be moved from the Oakland County Jail, an adult facility where he is checked on every 15 minutes, to a juvenile detention center.
"This extreme isolation is not beneficial whatsoever and actually harms" the suspect, his attorney Paulette Loftin argued of his detention at the Oakland County Jail.
Oakland County Assistant Prosecutor Markeisha Washington argued that he should be kept in adult detention, and said he was not completely isolated because he has access to a phone, tablet, and television.
She also argued that he had a detailed and premeditated agenda, per his text messages and journal entries, which should be enough to try him as an adult and therefore keep him in the adult facility — saying it was beyond the mind of a 15-year-old.
"In his journal, he described the type of gun he needed, who his first victim would be," the prosecutor argued.
The prosecutor also added that he detailed killing a family of baby birds in which he found "delight" and "joy."
The suspect's parents, James and Jennifer, also face charges and up to 60 years in prison. They have pleaded not guilty.
The suspect's defense attorneys, Paulette Loftin and Amy Hopp, did not immediately respond to Insider's request for comment.