The murder charge because he was committing a felony (stolen car among other things) and someone died. That it was a cyclist had nothing to do with the charge.
That's what's a little disturbing about this. Understandably the woman was frightened and could be excused for being reckless trying to get away. But she hit the guy going 85. Should she skate on that? Aren't there any limits? I think she did what she felt she had to, to protect herself, but I also think she should face the consequences even if she acts in fear.