Right now, I think we're back at square one as far as information. But, according to the People magazine interview with Jessica's father, she gave a first name only. IF that information is accurate, and the name was a common one, that could explain why there's been no arrest. I think it's also quite possible that her words were unintelligible, sadly, and there is a disagreement over what she said. JMO
Before she died, he [Jessica's father] says, Jessica told authorities the first name of the person who did it.
"I don't know the name she told," he says.
http://www.people.com/article/missi...death-jessica-chambers-told-police-who-did-it