What if Denise had called James to tell him about something that had upset her, and he rushed home? Like she was concerned about a vehicle repeatedly driving slowly past their home, or someone had threatened her, or threatened Jayme? Or a person who had previously been involved in an altercation with one of them at work had stopped at their house and pounded on the door? It would be interesting to know if any phone calls were made to James, Denise, or Jayme in the hours before the murders, besides the calls made from Denise’s sister. Any calls between Denise and James? Did Denise and Jayme stop anywhere on their way home from the party? You are correct, so many possibilities and we have so little information to go on.