How on earth do you make the connection between knowing where someone will be and being hired?
In the way that I described. It would seem he had information that would not be readily available to the public, especially knowing the exact time at such an opportune circumstance to be vulnerable.
The killers movements were tracked that morning. Strolling around getting coffee and snacks and stuff, then straight to the spot where, five minutes later, this CEO suddenly appears on the dark and empty sidewalk.
Thompson was not going to the office, that could have been staked out in advance (learning his routine). Like, someone who likes to be at their desk at 7AM will routinely be on the sidewalk in front of their office around 6:45. But this was a one-off where a killer would have no reason to expect his target to be at that hour.
The killer was in town even before the press release saying the day of the conference, and police say he went straight to the Hilton upon arriving in town. He knew when and where he could expect to find Thompson in this vulnerable position, with a window of a minute or so.
Seems too coincidental for "Lucky guess".
Eta: the announcement of the conference said only the town. I'd guess that they only gave the precise address to investors who queried/committed to attendance. The NYPD has, I'll bet you, almost certainly asked UnitedHealth for a list of every single person who was aware of this exact location, and are checking them out, looking specifically for investors from Georgia who.queried for the conference address.
Also, they'd be looking at Hilton staff who would be preparing for this CEO to show up early in the morning. The CEO wasn't showing up at 6:45AM to help set up the ◊◊◊◊◊◊◊ chairs for the conference.
It's actually a little bit odd that Thompson wouldn't have stayed at the Hilton itself, where this conference was being held.
Also, the murderer apparently had a bike set up to escape with already (possible coincidence that he happened to find one but I highly doubt it). The killer knew that at 6:45, Thompson would be on that sidewalk. I don't see how he could reasonably know that without someone feeding information about it that was intimate with Thompsons schedule.