I have to agree with other sleuthers who have SR as a person of interest. I am not certain if she is the perp, accomplice or covering for BR,but her body language on the tv clips says a lot. She is crying, but no tears. No tears!
When it was mentioned earlier on that a person of interest had stopped cooperating with investigators, i wonder if the person was SR and not BR. Because BR still gave reasons, such as he drove KRs car to test the fuel gauge and then that KR must've been abducted etc., so he must have cooperated until recently with police.
I also believe both VR and AR when they say that they dont believe that BR is responsible.
*** However, if eventually BR takes the hit, it may possibly never be known if it is because he is truly a vile husband or a loving father.