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That increase the creepy factor. Perhaps this person friended the business or a coworker???

No. Thats why I said its creepy. Almost like black magic.

Before you met this person, did you schedule anything in your calendar or something similar?

Edit:

Also, were there any other devices there? GPS? Video cameras? Microphones?

None at all. I use a dumb phone, the person in question didnt have a phone with him

There's something we're missing here. Not sure what.