The article Tim posted suggests two of his work colleagues were there looking into BIAM while MIB1 was also there. Could they not identify this MIB1 or answer questions as to why he was there.
I'm also very dubious about the brazzer angle. It's pissing rain, windy, horrible conditions, are you really going to be that horny you will ride some weapon outside in the cold and rain at 4am, just after popping into work to chat to a colleague and pick up an umbrella? Also would it really be arranged through some local scumbag pimp rather than just being offered by the girl herself, assuming he walks by her.
The way MIB1 follows TD down HR in the footage seems very sinister, rather than some deal to be made.
It is still unclear if indeed those two men to the left of MIB1 are work colleagues, it hasn't really being fleshed out at all their interactions with MIB1 or reasons for being there. Referred to as Mark and Gerard in the broadsheet article, iirc. Surely they can explain a couple of the uncertainities. If they aren't the two work colleagues in the stills then this points to a sinister 2/3 man team conspiring against TD.
I've just watched JFK again so am slightly rattled re-reading through this.