Not in a rush to locate him, IMO. That is done with an APB. If DW was a hot tip, or the parents had strongly hinted at, much less blatantly pointed a finger at him, there would have been an APB, possibly a federal one. If you have a strong suspicion of a traveling MH with a possible kidnap victim, that might possibly cross state lines, you put out an APB. Not wait for them to return home after disposing of the victim.
The theory that DW was a prime suspect or fingered before the first interview does not fit, not in LE procedures, or LE behavior. Look how aggressive they got after first contact, when their suspicions were aroused. If their suspicions were aroused prior to that interview either from tipline info, or parental statements, where was that aggression then?
You can ask until the moon turns blue why there was no apb, and while you're at it, you can also ask why the police wouldn't permit Westerfield to call his attorney even though he asked some 22 times in 19 hours. You can also ask, while you're at it, why they misled the press about the porn, the bleach, and other items. The real "logic problems" here seem to be with someone who assumes that the police are following standard procedures, when it's apparent that they are not.
How do you know what time he returned home? What time did he drop clothes off at the cleaners? It appears there were people waiting near his house, maybe they were going to "surveil" him as mentioned at the briefing then changed their mind. Does DW have a place of business and would he likely be there on the weekend after taking off in his MH? How would the PD know where he stores his MH, it is a private location. Besides that, the PD might have taken a morning run for coffee and donuts and such before they got to really looking for him.
You have your opinion, and I have mine, I don't know what Brenda said but it appears to be an issue in the case. Amazing, nothing was brought up at the PH about what Brenda told the PD. We might see more about this issue at the motions hearing....