OK, so they didn't know ST was at home. Did the girlfriend live there when ST was in DC during the football season? If she did then why did they break in the bedroom door? Not afraid of a woman?
If she had a party at the house earlier, was ST there then?
I guess if the house sits empty if ST is out of town this story starts to add up. If the girlfriend lives in the house then they either meant to kill/scare/whoknows what to her or they knew her. IF so then the story has more layers to come.
Still a very sad deal.