The parents of Oxford High School shooter Ethan Crumbley, who was 15 when he fatally shot four of his classmates at school in November 2021, could face trial for the involuntary manslaughter charges filed against them.

The Michigan Supreme Court on Tuesday denied James and Jennifer Crumbley's appeal challenging a lower court's decision to allow the couple to stand trial.

The Supreme Court said it denied the appeal because judges "are not persuaded that the question presented should be reviewed by this Court."

James and Jennifer are each facing four counts of involuntary manslaughter. Evidence filed against them so far includes text messages that appear to show how they ignored their son's pleas for help in the year prior to the shooting. Jennifer also said in a Facebook post prior to the shooting that she and her husband purchased a gun as a Christmas present for their son.

PARENTS FACING MORE CHARGES FOR KIDS' GUN CRIMES, EXPERTS SAY

Ethan Crumbley, Jennifer Crumbley and James Crumbley mugshots

Ethan Robert Crumbley, 15, left, charged with first-degree murder in a high school shooting, poses in a jail booking photograph taken at the Oakland County Jail in Pontiac, Michigan. (Oakland County Sheriff)

The day of the shooting, both parents met with Ethan's school counselor after he was caught with violent drawings in class. Prosecutors say the parents "flatly refused" to take him home that morning. 

Hours later, Ethan took the gun his parents apparently purchased for him out of his backpack and killed 16-year-old Tate Myre, 16-year-old Justin Shilling, 14-year-old Hana St. Juliana and 17-year-old Madisyn Baldwin. He injured seven others.

OXFORD SCHOOL SHOOTER ETHAN CRUMBLEY CAN BE SENTENCED TO LIFE WITHOUT PAROLE FOR KILLING 4 STUDENTS

Ethan could face life in prison without the possibility of parole, a judge ruled last week. 

Oxford High School shooting victims

Ethan Crumbley, at age 15, walked into Oxford High School the morning of Nov. 30, 2021, went to classes, met with the school counselor with his parents and was sent back to class before he took a gun out of his backpack and killed 16-year-old Tate Myre, 16-year-old Justin Shilling, 14-year-old Hana St. Juliana and 17-year-old Madisyn Baldwin.  (FOX 2 Detroit)

In a March filing, the Michigan Court of Appeals laid out its reasoning behind allowing a trial for James and Jennifer Crumbley.

MICHIGAN JUDGE RULES OXFORD SCHOOLS, STAFF CANNOT BE SUED OVER 2021 ETHAN CRUMBLEY MASS SHOOTING 

"Despite their knowledge of all of these circumstances, when given the option to help [Ethan] and take him out of school, defendants did nothing," the filing states. "They did not, contrary to the recommendations of [school counselor Shawn] Hopkins, take [Ethan] home and get him immediate medical help. Nor, when they decided to leave him at school, did they tell school officials about [Ethan's] history of mental health issues nor explain to them that [Ethan] had access to a gun similar to the one he drew on the math worksheet."

Jennifer Crumbley, left, and James Crumbley, right, the parents of Ethan Crumbley, a teenager accused of killing four students in a shooting at Oxford High School, appear in court for a preliminary examination on involuntary manslaughter charges in Rochester Hills, Mich., Tuesday, Feb. 8, 2022. (AP Photo/Paul Sancya)

An Oakland County judge denied an appeal from James and Jennifer Crumbley, parents of Oxford High School shooter James Crumbley. (AP Photo/Paul Sancya)

The filing added that neither James nor Jennifer Crumbley asked Ethan "if he had the gun with him nor did they look in his backpack. And, when they left the school, defendants did not go home and ensure [Ethan] had not taken the gun."

OXFORD HIGH SCHOOL SHOOTING VICTIMS' ATTORNEY ALLEGES ARMED GUARD THOUGHT SHOOTING WAS A DRILL: ‘GOOD MAKEUP'

Attorneys for the Crumbley parents argue they could not have predicted their son's plan to commit a mass shooting before it happened.

A photo of Ethan Crumbley next to one of his violent drawings and a video of him at a shooting range

Ethan Crumbley killed four students and injured six others and a teacher in November 2021 at Oxford High School. (Carlos Osorio)

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If James and Jennifer Crumbley do make it to trial, it would be the first of its kind.

The parents left their hometown of Oxford at the time of the shooting, and authorities, including the U.S. Marshals Service, issued an alert for their arrests. Their attorneys said they fled for their own safety and turned themselves in several days later.