@MassGuy agree with you re timing of arrest (although much less familiar with US police & legal procedures).
In Australia, police usually know a lot more than what is being shared & reported by media. Journalist are legally restricted in respect to publishing things they might find through independent investigation (this is to protect ‘sub-justice’ court/jury integrity)
…I only mention this because this case seems so easily traceable. The owner of the car registration is known with presumably few individual who has access. Clear alibis can be established based on travel movements and tour dates, and no doubt there is loads of CCTV footage in that area