Do you know,,there's every possibility that JM knows that Jeremy didn't commit the murders,,but because the relationship came to an end,,over another woman,,JM turned tail,out of spite and had decided to dig as much dirt as she could. I'm almost certain that JM got as big a shock as Jeremy did when he was convicted,because I think what JM was trying to do,was to put the frighteners on Jeremy,as a way of getting her own back.
JM was the violent one in that relationship,not Jeremy.
I'd skip the country too if all I'd wanted to do was to scare someone. JM didn't visualise what really would happen. I'm sure she thought he'd walk free.
Spite and scorn knows no bounds. No wonder she won't face anyone.