This woman seems to be the Colleen Chisholm we are looking for. This image came up on a Google search using her name & teacher's union. The search yielded just her and her husband, the DA, along with a few pics of Scott Walker. The photo came from Watchdog.org, so I think it's the right lady.
She looks like someone who might have a vendetta against Scott!
Her hubby says she's the only person who can make him cry. I'd cry too, if I had to face her over breakfast evey day.