SB:
"Initially she didn’t even remember the parents, but when Vernal, the father, went back in there and quizzed her, she said, Oh, I remember you, but when he quizzed her about, do you remember seeing my son, she said, uh… I remember a child possibly, but I couldn’t tell if it was a male or a female."
[source: True Crime radio]
This kind of sounds like DK went back to the store with the purpose of trying to get the clerk to say she remembered seeing him - it wasn't just a chance encounter and "aha" moment - like, oh yeah, now I remember seeing you. I get the impression it was very important to DK to "prove" he was at the store (with DeOrr)....