I'm not sure why you are saying she wasn't asked again. The problem is the only reference to their descriptions was the officer's note asking a follow up question. The original description is what is missing.
District Attorney Mike Nifong gave defense lawyers nearly 1,300 pages of evidence last week, saying it was his complete case file. But lawyers for Collin Finnerty say those documents include only one reference to police asking the accuser for a description, in what appears to be an investigator's note.
"I asked her questions trying to follow up on a better description of the suspects, she was unable to remember anything further about the suspects," the note from Durham police investigator B.W. Himan says,
I probably misunderstood what Tucker was saying last night. It appears she indeed did give a description, which is what the defense wants to know. It is possible she wasn't asked again until the lineup, but I don't think we know that.