i've long suspected this but there is one problem here this would assume a person brought the car back a parked in knowing she was supposed to be staying there but my questions is how did they know what garage she was parked in? I don't think they would have to get the car back to the exact spot cause who would have know where it was exactly parked to begin with, but they would have had to know which garage she was parked in.
well if he brought her car back to the garage, he would need help getting home. Now we are talking conspiracy to cover-up murder