Your theory is plausible, which could also lead into the possibility RL is serving as a convenient distraction. It's sometimes a ploy used by LE, to make it appear they are focused on a certain person while observing another suspect who doesn't realize they're even under suspicion. LE hopes that suspect will develop loose lips because they come to see themselves as somewhat invincible.
This is one reason why LE media releases are not always geared toward informing the public on the progress of an investigation, if it's believed the guilty culprit is also listening to the news.
You make many excellent points.
Where I differ regarding it being a ploy is the very lengthy search warrant execution on the 17th. That's a lot of expensive man hours & resources when they could've scaled it down if it was a ploy. I've seen one MSM report that it lasted 10 hours. I saw quite a few LEOs & at least 1 K-9.
Also, the language shift in LE when they're responding to questions about RL. In my opinion they're giving pretty big hints about his being a big focus of the murder investigation.