Just thinking back over some details from early in the investigation.
Did police ever check that BS actually ordered a washing machine part? Because I remember an attempt was made to contact him about a washing machine part. I seem to remember the call was made the day William disappeared, but I could be mistaken.
Did police find a receipt, proof of a phone call to the supplier, etc?
Did police find that BS actually received the part?
I remember they raided a business premises.
Something is really bugging me. I feel like nobody should be taken at their word in this case.