http://www.iraqinews.com/iraq-war/isis-stones-five-women-dea...
This isn't in Iran, but doesn't hackuser's lame moral relativism argument also apply to ISIS? Isn't stoning women to death for not wearing the hijab simply part of their moral code? After all, the US doesn't allow women to show their breasts in public.
Edit: If your issue is specifically that someone implied that specifically rape/murder happens to women specifically in Iran specifically for wearing a hijab, here's a glimpse at what it means to be arrested in Iran: http://www.pbs.org/newshour/bb/world-jan-june11-iranianwomen...
You can see that women get arrested for not wearing the hijab here: http://www.independent.co.uk/news/world/middle-east/iranian-...
So no, for some reason I can't seem to find an official press release from Khomeini that a specific woman was raped/murdered for not wearing a hijab. I can only point to mountains of evidence of systematic oppression and abuse, which undoubtedly includes arrest/rape/murder, and which undoubtedly includes the violation of simply not wearing a hijab.