Very fresh thought. Are there portable scanners that are not too heavy to carry while carrying out all these other acts?Something just hit me, as well.
Many have questioned why the perp(s) would hang around at the house for 20+ minutes after shooting the father, because someone might have heard and called police. Maybe we've missed the obvious - what if the perp had a scanner tuned to the local police frequency? He would have known that no call was made regarding the gunshots and that he had plenty of time. He would also know when the 911 call was made, and if Jayme was hiding and made the call - he would then know that she was in the house.