The ones you're talking about are these videos:
Testimony of Child 1
Testimony of Child 2
They were not psychologists. They were police officers/investigators, and according to several sources they did not handle the matter correctly, some people believed that these officers were bribed to cover up the truth. You can either believe it or not, but there should've been at least one psychologist to accompany the two children during the testimony. All they wanted from the children were information, yet it was not extracted properly from them, no in-depth explanations and the questions seemed to jump too quickly from one another. You can compare the process of these testimonies to the real ones on youtube (the real testimonies from victims/suspect for murder, etc).
The case is closed, no further evidence was found. We do not know whether this was a hoax or not.