I would say a denial alone, without some further investigation to substantiate the denial, would not constitute reasonable suspicion because of the mistakes inherent in databases; but, that's me. There are probably a lot of people, including a fair number of judges (and let's face it, that's whose opinion matters in the end) who would claim it does constitute reasonable suspicion.
Heck, in some jurisdictions in the U.S. there have been search warrants issued (you need probable cause, which is a higher threshold than reasonable suspicion, for a search warrant) for addressed of suspects, which were found in internet database searches, that were years old. Entry was made and completely different people are living at the address.
My point is, if that quality of info can be considered probable cause for a search warrant, then yes, a denial could very well be considered reasonable suspicion.
Wish there was a more concrete answer. That is the best I can offer right now.
Heck, in some jurisdictions in the U.S. there have been search warrants issued (you need probable cause, which is a higher threshold than reasonable suspicion, for a search warrant) for addressed of suspects, which were found in internet database searches, that were years old. Entry was made and completely different people are living at the address.
My point is, if that quality of info can be considered probable cause for a search warrant, then yes, a denial could very well be considered reasonable suspicion.
Wish there was a more concrete answer. That is the best I can offer right now.