We do not know when the family got home that night. If Jayme & Mom were at the family party that afternoon, they probably got home early to mid-evening. This is speculation as it was a school night and also likely that many other attendees had work or school the next morning.
It has been stated but not proven as far as I know that Dad was working that evening. The plant shifts likely ended at midnight. The plant is about 5 minutes from the Closs home. By the time Dad clocked out, got his stuff together, maybe went to his locker or shot the breeze with a co-worker, he would be arriving home around the time the neighbors heard the shots. Perhaps someone followed him from the office. Maybe someone came up behind him as he was entering the house and JC tried to push it shut. This could be when it was kicked open and Dad was shot. Or there may have been a verbal confrontation after the perp got in the house and before Dad was shot. It seems from the police log that Dad was dead inside the door, but he may not have been killed by the shots heard at 12:30.
Maybe two warning shots were fired as he entered his home. This gives a little more time playing out for people who are wondering why the perp would stay so long after the first shots.
That leaves Mom and Jayme. Were they sleeping and woke up to that gunshot? Mom may have tried to act as a decoy to keep the intruder away from Jayme. She may have thrown the chair, been involved in a viscous struggle, then ran towards the bathroom to keep the attention focused on her. She may have been shot then. The intruder may have been looking for Jayme or she may have come out of her room. I believe that maybe this is when he grabbed her. She puts up a struggle. He starts to drag her out, she is yelling. Mom dials 911 and police may hear Jayme calling out as she is being taken away. This is what is heard on the call and why LE says Jayme was alive at the time. It also puts him on the way out at the time, already in control of Jayme and able to get away in the 4-7 minute time frame.
Just my Sunday ramblings.