Ottawa police are reviewing their 911 policies for dispatchers after two Good Samaritans in a Porsche engaged in a high-speed chase to help nab an alleged attacker.

The two men, Ryan O'Connor and Matt Spezza, the brother of Ottawa Senators player Jason Spezza, had called 911 after a woman near Fallowfield Road told them Friday night that a man had attacked her.

"I got out of the car and he was just telling her to shut up," said Spezza.

"That's when I started running towards his car — ask him if he wanted to be a man. And then he sped off."

O'Connor and Spezza said the woman got in their Porsche and they sped after the man, following him along the city's back roads at speeds up to 170 km/h while talking to a 911 dispatcher.

Police said they caught up with the chase on Highway 416 and have charged a man from Brockville in the incident.

Vern White, Ottawa's police chief, however, said the chase by the citizens should have been called off.

"I do appreciate what Ryan and Matt did here. My problem, from a policing perspective, comes down to the pursuit part," White told Ottawa Morning host Kathleen Petty.

"That's totally our problem, and we should have stopped this pursuit," he said.

"We would not have allowed a police officer to do that pursuit with a victim in the back seat."

White said that the policies for dispatchers will be reviewed.