Interviewed a week after the dogs were brought in and blood traces were found, the McCanns did this interview. Does Gerry give a little Freudian Slip here when he mentions murder? Look at his tell-tale "gulp" near the end.
In this radio interview, Philomena McCann just doesn't know when to keep quiet. Talking too much doesn't help at all. Or does it? Listen for yourself how she quickly corrects herself after saying that the twins haven't been told where Madeleine is. Staggering stuff.