Presumably Baker would have immediately shown the RCMP the Amazon transaction record for his (legitimate) payment to the (fraudulent) seller. And that Baker's payment to the seller would have been timestamped before the seller perpetrated the fraud on the Walmart account and shipped the goods to Baker.

If you saw the timeline above, and you believed the transaction records were accurate (and I assume the RCMP has the means to verify those transaction records with Amazon and Walmart), then what would you conclude was going on?

Would you assume that Baker was a master criminal who was acting as both the buyer and crooked seller, and was covering his tracks with a prepayment from himself (as the buyer) to himself (as the seller), thereby creating a transaction record to give plausible deniability?

Even the most cynical jaded hard-edged RCMP officer should see that doesn't make sense. Either the investigation was very incompetent or there's some more detail to the story that we haven't heard.