First hand account of the incident:
I arrived at the corner of Bank and MacLaren this afternoon as three police officers were trying to put an unconscious, handcuffed woman into the back of a van. She looked like a rag doll.
Then they changed their minds and laid her out on the sidewalk and sent for an ambulance. The female officer slid a piece of cardboard under her, so at least she wasn’t lying in the puddle.
I asked some other bystanders if they knew what had happened. Two men, who said they had witnessed the whole thing, told me that she had been walking down the street smoking a cigarette. A cruiser drove past, stopped, and an officer got out and approached her. She ran. The police caught her. She resisted. She was a tiny little thing, they said, but she put up a helluva fight. It took three officers to bring her down.
“And the big cop, he slammed her face-down into the sidewalk just like she was a huge man,” said one of the men.
Then, he said, they cuffed her and went to put her in the van. She was part-way in when suddenly she just collapsed. Unconscious. She was bleeding from the head. That’s roughly when I came along.
More here