This Channel9 video says..."blood allegedly found in a four wheel drive owned by the couple". (Channel7 was the one, I think, mentioned the blood & life insurance policy...will look for that vid later)
Search on the site for "Baden-Clay behind bars"
http://channelnine.ninemsn.com.au/video
In that same video it also mentions...allegedly police were going to arrest him on three separate occasions but they held off......wonder when those times were.
...also spotted in the video, towards the end, at the bridge, what looks like our good man Danny Boyle.