I admit to skipping a few pages of the last few threads here and there, so I apologize if this has been brought up before; I have been meaning to mention it but I keep bumping into a locked thread.
Cross-racial identification is known to be notoriously unreliable. I could attach a link, but if you google it, you will find a dozen scholarly articles about it on the first page of results only.
I am still not sure whether I believe Sherri is possibly protecting herself and her family by not revealing the real descriptions (or even identities) of her abductors, or she simply really doesn't have more than what LE have revealed about her captors. The latter is not possible only because they could have kept their faces or Sherri's head covered at all times, but also because (added to consciously trying to conceal their looks) of the cross-racial identification aspect of it.
JMO