Going with the theory that TS disappeared KS he would have most likely acted immediately. Going with the theory that CP disappeared KS he may have layed low until later the next day. He could have left knowing she was deceased but had anyone found her in the interim he could have said he just thought she was sleeping when he left. Thinking about the possibility of her toxicology reports coming back with a drug that could be linked to him .. He enlisted help of someone and disposed of her when the coast was clear. He simply could have rolled the dice that he could get back to dispose of her before anyone else found her.