His Wikipedia article [0] is not as skeptical of his abilities and qualifications as I would have expected. Neither is that of the Vidocq Society [1]. Articles on controversial living people are hard to manage, but the Wikipedia articles and the NY Magazine article present opposite views of Walter, and I suspect they're both a bit distorted.
[0]: https://en.wikipedia.org/wiki/Richard_Walter_(psychologist)
[1]: https://en.wikipedia.org/wiki/Vidocq_Society