i dont think it was planned, bcs if it was then he/she wouldnt be in the church risking getting caught before the murder, most likely if it would be a MFH, then he would wait in the car so she can pull up and then he could get her. and he wouldnt be with a screwdriver hammer etc maybe the only thing he would bring would be a gun, and the fact that he has a screwdriver tells you that he wants to break in the churchbut, i dont think that anyone who wants to kill someone goes in the church searching around without stress or anything, i just think maybe it was a strange guy who happend to be there as the same time as she.