I am not saying that she is absolutely guilty of the crime. I am convinced that she and her boyfriend have some level of involvement or were accomplices in the crime. You are trusting someone who is a proven liar and it reflects badly on yourself.
What is the case is "the bloody footprints" weren't made by blood but by something else that also triggers lumisol. This story IS NOT PART OF THE EVIDENCE. It was totally discredited some time ago.
I'd say that's a mighty poor reflection on you.