Heather broke the brainwashing in the mini, and went on the run.
I don't think she's still brainwashed so much as properly paranoid. The government took custody of her daughter away citing the dangerous nature of her work as Vindicator, and soon afterwards, her daughter was kidnapped as part of a villainous plot (yes, I know it was Heather, but the point still stands). So now Heather's using some common sense and protecting her daughter at all costs.