A few things. 1. Why would the Police release the bones if the crime had not been solved ? It came across to me like the Police were very careless releasing the remains (In the UK, evidence can be kept for decades) 2. I believe that Rob had someone else do the dirty work and wanted to make sure for himself that the laid out skeleton was Patrices body so that he could take ‘possession’ of her again 3. The person who killed Patrice received payment via the Automobile / Car and the Wedding ring. Rob would have asked the killer to meet him with the wedding ring finger (with the ring still on it) as proof of death for the final payment 4. Rob under questioning would pass a polygraph test as he had committed the image of the laid out bones to memory and could use this image to verify the one thing (missing wedding ring finger) that would incriminate him and have it struck off as he has seen the bones already 5. My two cents is that the hired killer turned up at the hair salon with an elderly lady in tow (conveniently with Alzheimers) and used her as bait to lure Patrice into the car. A lot os criminals live with elderly relatives - at least in TV drama world