I thought I saw mentioned May 5, was that the date TB texted or called ROOM mate because she had something to tell him before he came inside? If that's the case I believe that on the 5 May TB harmed Samual very badly with blunt force trauma but he was still alive. JMO but I think he was on the bed at that time, I might be wrong. Again TB contacted Roomie a few days later, this I think is when he was struck with sharp trauma and died and was carried to the bath tub.
Anyone, please correct me if I'm wrong.