A mother in Oregon described watching the surveillance footage of her autistic five-year-old son wandering off school grounds and into traffic as a 'horror movie.'

Erin McDonald-Wentzell told KOIN 6 that her non-verbal child, Ginsburg, escaped from the playground of Grout Elementary in Portland on September 9.

McDonald-Wentzell told the outlet she reviewed the footage that showed her son leaving through an open gate and making his way to Holgate Boulevard.

The mother said the video was like watching 'a horror movie playing in slow motion because you can see exactly what’s happening and not being able to stop it.'

Officials said they received multiple 911 calls around 9.42am that day reporting a child crossing the boulevard.

Officers were dispatched but the report was cleared at 9.47am after a caller reported that the child was with a school principal and police were no longer needed.

McDonald-Wentzell claimed the footage showed Ginsburg outside for four minutes, which was then followed by a five-minute gap in the footage.

'There was a breach and then there were lots of point where he was just not being paid attention to,' the mother said. 

Portland Public Schools (PPS) told the outlet that the ordeal lasted only four minutes in total and said staffing challenges played a role in the school’s response.

McDonald-Wentzell rejected the district's remarks, saying: 'That would be a completely valid conversation, and this would’ve been done by now. That’s not what happened.' 

The mother has kept her son home for nearly two weeks while awaiting answers from the school.

'We want our son back in school, and we really just would love transparency,' she said.

McDonald-Wentzell added that it wasn't the first time Ginsburg left the school grounds.

He previously made it to the street on September 3 before school staff brought him back.

Still, the mother said she was able to find some hope after the latest incident.

'I saw hope because I saw my son know where to navigate when he realized that something was wrong,' she told the outlet.

'I saw him navigate to the doors and wait for help, and I saw him looking for helpers.'

PPS told the outlet that it has implemented a new safety plan for Ginsburg and also shared a statement: 'At Portland Public Schools, the health and safety of every student is our highest priority.'

'After reviewing what occurred at Grout Elementary, we took immediate steps to reinforce safety procedures and put additional safeguards in place. We remain committed to providing a safe, secure and supportive learning environment for every student,' PPS added.

The Daily Mail has contacted PPS and the Grout Elementary Principal for comment.