Even as the last class of students who were victims of the 2021 Oxford High School shooting graduate this month, the fallout from the violent gun attack continues in the community and in the courtroom.

With an independent investigation into the emergency response to the Nov. 30, 2021, attack underway in Oakland County since last December, Attorney General Dana Nessel is expected to launch a state-level investigation into the attack later this year. Nessel said in February that it would take six months to review previous investigative materials.

Oxford families of slain and injured students have called for Nessel to conduct a comprehensive examination of possible criminal conduct by school staff and failed policies before the attack that killed four and injured seven, including a teacher. They are demanding accountability, including criminal culpability of school employees.

The shooter, a sophomore at the school at the time, fired his weapon 33 times in the attack and killed Hana St. Juliana, 14; Madisyn Baldwin, 17; Tate Myre, 16; and Justin Shilling, 17.

In 2023, the company Guidepost Solutions performed an independent investigation of the attack for Oxford Community Schools, producing a 572-page report. The company found that missteps and failures by Oxford’s former superintendent and two former members of his administration snowballed to allow the shooter to slip through the school’s threat assessment and suicide intervention systems.In December, Guidepost was hired by Oakland County officials to perform an after-action review of the emergency response to the attack. A final report is expected in late June or July. The Oakland County Board of Commissioners approved $500,000 for the third-party review.

Lawsuits filed by victims and their families have alleged that the district failed to protect students and downplayed the threat the killer posed to the school.

In March, a federal appeals court panel said two Oxford Community Schools officials will no longer face claims they pushed the killer closer to violent action, a ruling that effectively ends a collection of federal civil lawsuits filed by families and survivors.

The killer, Ethan Crumbley, and his parents, James and Jennifer Crumbley, remain behind bars. Both parents filed requests for a new trial or a dismissal of their convictions on four counts of involuntary manslaughter. On Tuesday, a three-judge panel of the Michigan Court of Appeals declined the teenage shooter’s requests to withdraw his guilty plea or be resentenced after an Oakland County judge declined to do both.

Also last month, an Oakland County judge asserted that she believes prosecutors improperly failed to disclose agreements made with two Oxford High School officials shortly after the shooting, but she has not made a decision on what that means for the shooter’s parents.