A Montreal police officer notorious for her aggressive behaviour has been suspended after another incident was caught on tape.

Const. Stefanie Trudeau, known locally as "No. 728" after her badge number, has been disarmed while an internal disciplinary investigation is carried out, Montreal Police Chief Marc Parent said Thursday.

Trudeau was first captured on video in the spring pepper spraying what appeared to be peaceful student protesters.

In the latest video, from Oct. 2, she uses questionable language and behaviour during a violent takedown of two people after apparently seeing one of them with a beer bottle in public.

Later, an audio recording allegedly captures her railing against students and artists in a conversation she had with her superior.

In some cases, she referred to the students as “rats” and “those damn red squares,” the insignia of Quebec's student-protest movement.

After video of the incident was broadcast on Radio-Canada, Trudeau was demoted to desk duty.

Parent on Thursday apologized to anyone who may have been offended by Trudeau’s comments.

“(This) is not what we want to hear from our police officers,” he said. “It is not based on our values.”

In the video of the Oct. 2 incident, Trudeau is shown putting a man in a headlock and dragging him down the stairs in a choke hold, before handcuffing him.

In a subsequent conversation with a superior, recorded on a cellphone, she is heard talking about "rats" and "guitar-plucking" artists.

Trudeau has been reprimanded for the spring incident by the police ethics commission.

Dominique Peschard, president of the Ligues des droits et libertés, says he wonders why Trudeau’s actions in this latest incident were not reported by her fellow officers or superiors.

“The comments that were taped were quite outrageous,” he said. “And it seems that only when it became public, the police force reacts, so that sort of like shows in our opinion a sort of impunity within the police force.”

According to the police chief, the force is looking into that issue.

In the meantime, there are calls for officer 728 to be fired.

A protest calling for her permanent dismissal is schedule for tomorrow night in Montreal.

With files from The Canadian Press