A constable accused of assault and racism will be off patrol duty for at least the next month, the Edmonton Police Service said Friday, hours after three human rights groups called for the officer to be reassigned.

A disciplinary hearing for Const. Nathan Downing was adjourned Wednesday after a witness testified she had been arrested by the officer two weeks before she was to testify against him.

"The constable is on a pre-approved leave, and will not be returning until near the end of June," spokesperson Patrycja Mokrzan said in an email Friday afternoon. "His duty status will be clarified at that time."

Downing had remained on patrol since he was charged under the Police Act in March 2018 with unlawful or unnecessary exercise of authority and other offences.

The constable is accused of using Islamophobic language and excessive force during a 2015 arrest that left Nasser El Hallak with facial fractures and other injuries.

At Downing's disciplinary hearing this week, El Hallak's neighbour, Crystal Fox, testified that she witnessed the assault. She told the hearing that Downing had arrested and charged her two weeks before she was scheduled to testify.

One day later, based on a joint application by counsels for Downing and police chief Dale McFee, the hearing was adjourned and police launched an investigation into Fox's arrest. She was charged for driving with a suspended licence.

On Friday morning the National Council of Canadian Muslims, the Alberta Muslim Public Affairs Council and Hate Free Yeg urged the police service to remove Downing from patrol duties until Fox's allegations are investigated.

Downing's leave represents a small step in the right direction, said Abdul Malik with Hate Free Yeg.

"It shouldn't even have come to this mess right now, it should have been dealt with in a much more efficient quick fashion," said Malik. "But we're not going to deny that if he's off the streets and on leave right now. That is a positive change."

As decision makers assess Downing's duties upon his return, Malik said, they must keep in mind that the integrity of the police service is dependent on the trust people put in it.

"And things like this undermine that trust immensely," Malik said. "There is a history of issues with policing around at-risk and particularly marginalized communities. If EPS wants to rehabilitate that trust, that involves actually being accountable for what they would call the bad apples."

Downing, who denies the allegations stemming from the 2015 arrest, said he delivered one punch during a struggle to subdue El Hallak.

Downing's partner that night, Const. Nicholas Talvio, also faces charges at the disciplinary hearing, which is scheduled to resume on July 24.