I can picture him driving back into the neighborhood, after disposing of Breeann, and saying" hey what's going on, let me help" kind of thing...
And dealing with the bike later? If he had it hidden in his house. Or else he took bike and her body away at the same time, and took the wheels off whereever he left her...
I wonder if later on, someone recalled that his was the only car that had left the street just before she was reported missing...I know we've heard rumors about the wife turning him in, but maybe someone else remembered seeing him drive away before LE showed up.