Diamondeye should be executed tonight, not put in the brig, and that's for a reason independent of the case against him, sprig, or anyone. I've already suggested this to some in private, but this would go whoever our top vote-getter was, because if we go straight to the next day and nothing happens at night due to this party, we're stuck with exactly no new information by putting someone in the brig. Then we'd essentially be wasting a day of voting and having to decide to imprison or execute again tomorrow. So if we intend to execute anyone, today OR tomorrow, we should do it today and then we'll have feedback and can consider our course of action tomorrow.
Then there's just the fact that Diamondeye has also not answered for any of the things that make him a suspected rogue, his case above was pretty empty, so I'm still entirely sure he must answer for his wrongdoings. It's the best case we've had so far and all the evidence points to Diamondeye's crimes as much as we could ever expect to get evidence on anyone.