cop from todays press conference stated the music played from the van was.....
Downtown by Petula Clark
www.youtube.com%2Fwatch%3Fv%3DZx06XNfDvk0
this whole thing gets stranger.
cop also stated the van had cctv cameras at the front pointed at the rear mirrors
nice straight road, 1am ish. could it be a remote control RV with a deadman / dummy at the wheel?