ATLANTA, Ga. (Atlanta News First) - Thursday's historic sentencing of Colin Gray to 15 years in prison has redefined the boundaries of parental responsibility in America, signaling what legal experts call a permanent shift in how families are held accountable under the law. Parents are now having to think about the fact that they are criminally liable for the acts of their children, said criminal defense lawyer Charles Cullen, who analyzed the landmark case. That's a new frontier and different jurisprudence in the United States. Gray, the 55-year-old father of Apalachee High School mass shooter Colt Gray, was formally sentenced on 27 charges, including second-degree murder, involuntary manslaughter, second-degree cruelty to children and reckless conduct. The sentence, handed down by Barrow County Superior Court Judge Nicholas Primm, follows Gray's conviction last March in connection with the Sept. 4, 2024, attack that left two students, Mason Schermerhorn and Christian Angulo, and two teachers, Cristina Irimie and Ricky Aspinwall, dead and nine others injured. Victims of the Apalachee High School shooting (from left to right): Apalachee High School teacher Richard Aspinwall, student Mason Schermerhorn, student Christian Angulo and Apalachee High School teacher Cristina Irimie. (WANF) While prosecutors pushed for consecutive sentences totaling up to 80 years in prison, Primm ultimately ran the sentences concurrently, resulting in a total of 15 years in confinement. According to Cullen, the judge was heavily swayed by the distinction between direct intent and failure to act. The judge really seems to have been driven by that and reaching the sentence of 15 years, Cullen explained. All of the crimes for which Colin Gray was convicted are crimes of anything other than negligence... None of this is something where he intended to go out himself and commit a horrible act. By running the sentences concurrently, the court kept the punishment aligned with the only other case of its kind in the nation. That keeps us in line with Michigan, who also sentenced two parents in connection #atlantanewsfirst #crimewatchatlanta