Are government employees required to remain neutral on illegal activities?

From the Austin American Statesman [H/T Joshua Rosenau]
[Texas'] director of science curriculum has resigned after being accused of creating the appearance of bias against teaching intelligent design.
Seriously?
Comer was put on 30 days paid administrative leave shortly after she forwarded an e-mail in late October announcing a presentation being given by Barbara Forrest, author of “Inside [...]