Handing out refreshments and wearing pink and purple ribbons isn't a real picture of a frantic family in search of their daughter.
Of course, in Damon's self-defense, he DID ask a neighbor if he'd seen Danielle that morning, because she was known to "sleep-walk"...(sarcasm mode off)
sw
Unless he already knew what had happened. That, in my estimation, would be the only reason to go for the PR instead of the PI.