Brittany Ingle was accused of lunging and punching Alyssa Shepherd in December after a judge sentenced Shepherd to four years in prison.
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RELATED: Driver attacked by victims' mom at prison sentencing in deaths of 3 siblings at bus stop
Shepherd's attorney plans to appeal, claiming the courtroom scuffle was a crime.
Shepherd was convicted in October. In December, she was sentenced to a total of 10 years: four years in prison, three years in home detention and three years of probation.
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RELATED: Twin boys, 6, and 9-year-old sister fatally struck at school bus stop in Rochester, Indiana; driver charged
Shepherd was charged with three felony counts of reckless homicide and one misdemeanor count of passing a school bus while its arm was extended, causing injury.
She struck and killed 6-year-old twins Xzavier and Mason Ingle and their older sister, 9-year-old Alivia Stahl, in 2018 while they crossed the street to board their school bus. An 11-year-old boy was also injured.
The school bus had its lights on and caution arm extended.