Norman Lewis disappeared in March 1994. Noreen Renier was called in to assist in July 1995. Are you saying that the police were still exploring some likely places to look in July 1995 after 16 months of fruitless searching?
I don't know what they were doing, since this is undocumented. In retrospect, if they were still thinking about it (if they brought in a psychic, it suggests that this is the case), searching nearby bodies of water seems obvious. It isn't clear why they just didn't do that. They seemed to act like they needed an excuse to do so and used Renier's reading as that excuse. But it's pretty clear even looking at the edited version that the reading provided no direction as to where a search could be focussed, so the choice of where to look had to have come from the police.
Linda