At least Jeremy's previous crimes ( drugs and the caravan park theft ) didn't have to be prised out of him.He quite willingly admitted to having marijuana on him when first arrested,so he wasn't backwards in coming forwards over admitting those things,the same as he would have been over the murders had it been him. He was just one of those people who couldn't keep anything to himself,this is why there's been no admission this past 30 years because he simply didn't do it and I believe him.