Air Date: Sep 04, 2013 12:00 AM ET
North Battleford RCMP want to be able to better track missing persons who they suspect may have perished in the North Saskatchewan river. So they've teamed up with U of S Professor Ernie Walker for an experiment. Craig learns more from Ernie.
Top News Headlines
Welcome to The National, the flagship nightly newscast of CBC News, hosted by Peter Mansbridge.