What's got me stumped is that Sam must have had a reasonable explanation for having an expensive car and accessories when he reported them stolen last year. I had my car stolen from Wilston Station and police asked all kinds of questions, even if I knew who stole it? lol
Sam was 22 yrs old, he must have been queried about his finances by the police. Maybe, he won some money, like $50,000, so this was legit, but to keep up the lifestyle and being in the company of 'unsavoury friends', led him to the drug industry.
If this isn't anywhere near the truth than imo, it explains the reason why the police aren't mentioning drugs, because they would have interviewed Sam at length you would think, back in September and didn't find anything suspicious. It doesn't add up. That's my wacky theory for the night.