Updated Oct. 9, 2012 – 3:40 p.m.

Riverside police are still investigating the death, Friday, of a 37-year-old North Aurora man who, witnesses say, intentionally stepped in front of a freight train.

According to a statement from police, Mark Cody walked up onto the furthest south track, just east of the Longcommon grade crossing, around 7:20 p.m. using a medical walker. He was struck after turning his back to the eastbound Burlington Northern-Santa Fe train.

Cody became lodged underneath one of the railcars and required Burlington Northern-Santa Fe to spend several hours uncoupling the freight in order to examine the scene.

He had a “do not resuscitate” medical order in his pocket at the time, but Riverside Police Chief Thomas Weitzel said it did not include specifics about his condition. Weitzel said the Cook County Medical Examiner’s Office ruled Cody’s death a suicide as he did not make an attempt to move when the conductor applied the brakes and blew the train’s horn.

Cody lived on Forest Avenue in Riverside until the end of 2010, which was about a block from where the accident took place, Weitzel said. Police had contact with Cody since about 2007 for parking tickets and medical issues.

Investigators were following up with Cody’s family on Monday, Weitzel said, and the investigation will likely wrap up in the next few days.