How do you know they "refused" to indict? If they had "refused to indict," a report was required to be issued.
No report was issued.
Let's see, they didn't indict, they didn't charge the Ramsey's, they didn't issue an arrest warrant for either of them, they didn't issue any arrest warrants for anyone in the case.
The prosecution asked them to indict (reason for a Grand Jury proceding) therefore, the grand jury refused to indict. Simple logic.