A disturbing video has emerged showing an accused “killer” father forcing his 6-year-old son to run on a treadmill because the child was “too fat”.

Christopher Gregor, 31, appeared in court Tuesday, April 30 to stand trial for allegedly murdering his son Corey Micciolo in 2021. He faces life in prison if convicted.

During the trial, the Superior Court in New Jersey was shown surveillance video of Gregor forcing Corey to run on a treadmill after the boy fell off multiple times due to the exercise machine’s excessive speed.

Gregor and his son were seen on March 20, 2021, entering the Atlantic Heights Clubhouse fitness center, where the boy was promptly placed on the treadmill and began running, according to a video, obtained by CourtTV.com.

Footage captured Gregor walking up to the treadmill to increase the speed and raise the incline of the track.

The sudden changes in speed and elevation were too much for the little boy’s legs, causing him to fall down and slide off the moving track.

Despite the son falling off, Gregor lifted and tossed him back onto the treadmill, which forced the child’s legs to fold backwards as the father seemingly clamped his teeth into Corey’s head.

The boy gets back on, but again falls off and continues to struggle to remain on the machine, eventually leading the father to decrease both the the speed and incline.

The boy’s mother, Bre Micciolo, was the first witness to take the stand and was in tears as she watched the horrific video.

Days before her son’s death, Bre Micciolo reported the boy’s injuries to the New Jersey Division of Child Protection and Permanency, according to the US Sun.

On April 1, she requested that Gregor take their son to see a doctor.

NEW: Mother breaks down in court as she watches her son’s father abuse her child by making him run on the treadmill because he was “too fat.”

New Jersey father Christopher Gregor is accused of killing his 6-year-old son Corey Micciolo.

New footage shows the boy repeatedly face… pic.twitter.com/aVKknkOGd5

— Collin Rugg (@CollinRugg) May 1, 2024

While at the appointment, Corey reportedly revealed his father made him run on the treadmill “because he was too fat,” the outlet reported.

The next day, Gregor rushed the young boy to the hospital because the boy woke up from a nap stumbling, slurring his words, and experiencing nausea and shortness of breath, according to Court TV.