I'm sure you will be only too happy to tell us how you, Boylan or anyone else could construct a composite out of thin air. The following quote is included in the link below:
The younger girl has not been able to clearly describe the man, telling police only that the kidnapper carried a small black gun and was about 5-foot-8, white, with dark hair, and dressed in a tan denim-type jacket and white baseball cap.
If you believe, & you do, that MK could not describe the man, then your question makes sense. I do not believe that she couldn't describe him - she did describe him to her parents, & I would bet you a large amount of money on that.
Lois screamed like a gut-shot panther. Ed panicked. We need to know why Ed, his beautiful 14-year-old daughter's life in danger, would choose to call family, friends, & neighbors before calling the police? The answer - because he knew who the kidnapper was & wanted to do everything he could to get her back without the police & publicity. It took him (them) 2 hours to realize that wasn't going to happen.