The parents of a Michigan teen who is accused of a fatal school shooting are asking a judge to lower their bond and help release them from jail.

James and Jennifer Crumbley have been locked up since Dec. 4, unable to come up with $500,000 each to leave custody and await trial on involuntary manslaughter charges.

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In a court filing, lawyers said the Crumbleys are not a risk to the public and would wear electronic monitoring devices. Oakland County Judge Cheryl Matthews will hear arguments Tuesday on a request to lower bond to $100,000 each.

Ethan Crumbley, who turns 16 next week, is charged with murder and other crimes. Four students were killed and more were injured during a shooting at Oxford High School on Nov. 30.

The parents are accused of failing to keep a gun secure at home and failing to reasonably care for their son when he showed signs of mental distress. They have pleaded not guilty.

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“The Crumbleys were absolutely shocked parents who had no reason to foresee what would happen,” defense attorneys Shannon Smith and Mariell Lehman wrote.

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The Oakland County prosecutor’s office opposes a lower bond for the Crumbleys, noting that a similar request was denied by a judge in a lower court.