Creepy bearded guy pops up a couple of times.
Bushy beard and black jacket.
Here he is watching Laura come down the street. Howlett starts tweeting her about the coffee in her hands just after she rounds the corner and comes into view for the bearded guy.
And here he is FOUR HOURS LATER in the same spot, watching Laura interact with the homeless man. Howlett tweets her about the homeless man incident, revealing that he could see her at the time.
Is this guy Howlett? Is he the same guy that is filming on the boat?
He could be some kind of security for the jewellery store - which would explain him being in the same spot 4 hours apart - but he seems to leave his post just after Laura leaves?