(AP) — Two lawsuits seeking $100 million each have been filed against a Michigan school district, its superintendent, and others after four students were fatally shot and others wounded at Oxford High School, a lawyer announced Thursday.

The lawsuits were filed in federal court in Detroit by Jeffrey and Brandi Franz on behalf of their daughters, Riley, a 17-year-old senior who was shot in the neck on Nov. 30, and her sister Bella, a 14-year-old ninth-grader who was next to her at the time, attorney Geoffrey Fieger said.

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They’re the first known civil suits filed in connection with the shooting. Named in the suits are the Oxford Community School District, Superintendent Tim Throne, Oxford High School principal Steven Wolf, the dean of students, two counselors, two teachers, and a staff member.

The Associated Press sent an email Thursday seeking comment from the district.

Ten students and a teacher were shot at the school in Oxford Township, roughly 30 miles (50 kilometers) north of Detroit.

Ethan Crumbley, a 15-year-old sophomore at the school, was arrested at the school and has been charged as an adult with murder, terrorism, and other crimes. His parents, James and Jennifer Crumbley, later were charged with involuntary manslaughter and arrested.

Personal-injury lawyers have expressed doubt that the school district could be successfully sued for letting Crumbley stay in school. That’s because Michigan law sets a high bar to wring liability out of public schools and other arms of government.

“You have to show that the administration or faculty members were grossly negligent, meaning they had a reckless disregard for whether an injury was likely to take place,” said attorney A. Vince Colella.

The gun used in the shooting was bought days before by James Crumbley and their son had full access to it, prosecutors said.

The morning before the shooting school officials met with Ethan Crumbley and his parents after school after a teacher found a drawing of a gun, a bullet, and a person who appeared to have been shot, along with messages stating “My life is useless” and “The world is dead.”

The Crumbleys “flatly refused” to take their son home, Throne has said.

The Franz family lives in Leonard, just northwest of Oxford. One of the lawsuits criticized school officials for not expelling, disciplining, or searching Crumbley prior to the shooting which allowed Crumbley to return to his classroom “and carry out his murderous rampage.”

The lawsuit also said the school district “knew or should have known that the policies, procedures, training supervision and discipline” staff members named in the suit “were inadequate for the tasks that each defendant was required to perform.”

On Wednesday, a statement posted on the district’s website by Throne said that after all the facts have been obtained and released through the course of the prosecution, he will recommend to the Oxford Board of Education that the district initiate a review of its entire system “as other communities have done when facing similar experiences.”

“Our goal with all of this is to bring together all of the facts of what happened before, during, and after this horrific incident,” he wrote. “We are committed to doing this in a way that allows our community to move forward and does not re-traumatize our community members, who are reeling and suffering from this horrible event.”

The criminal cases against Ethan Crumbley and his parents are being overseen by the Oakland County prosecutor’s office, and Michigan’s attorney general said Tuesday her office will review events that occurred before the mass shooting, despite the district’s rejection of her offer to be its third-party investigator.

The district’s lawyer told the attorney general’s office Monday it was fully cooperating with local law enforcement.