Yes he did. And I have faith since Longo's Dept. the FBI and the SA's office all support
(Regarding whether Longo said abduction charge was from forensics)
Unless I missed something, I don't think so. What he said was (I'm quoting from an article, I don't have the transcript)
'This afternoon we reached that point where the commonwealth [Virginia’s attorney’s office] felt we had sufficient probable cause to seek an arrest warrant. So we appeared before a magistrate, DS Mooney did, very late this afternoon. And we obtained an arrest warrant for Jesse Leroy Matthew Junior of Charlottesville charging him with class 2 felony, abduction with intent to defile.’
The article also says he declined to answer questions about whether the new charges were based on new evidence.
http://www.dailymail.co.uk/news/article-2766843/Police-remove-clothing-home-man-seen-missing-UVA-student-Hannah-Graham-second-search-house.html#ixzz3ES3gF9zt