Damn damn damn.
With everyone else, does Mr Grey Suit always shoot at the other guys? Ive tried 4 times now and I cant get the grey suit to not shoot at me, let alone get in the car with me again. Im thinking maybe it was just bugged when he got in with me.
The 4th time I tried the black suits shot the grey suit so that is strange, why the hell would they do that.
For me it depends on who I approach. Approach black suit guys, grey suit shoots them. Approach grey suit or scientists and the black suit guys shoot them. I followed grey suit for a bit, but when we got to the road he gave me the "I'm FIB back the f*ck off" line before shooting.
A while ago, in a <100% save game, I landed a buzzard pretty near their cars and approached them (i was with mike in epsilon clothes, during the 10 day mission).
As i got close to the cientists (there were 3) on of the suits came and pushed me, so i punched him back KO with just one punch.
No shooting, nothing, they all just fled the place on running (scientists to NE and suits to SE).
Quickly i got into the buzzard and went scientist chasing,
While airbourne i only managed to trace 1 of them and chased for like 5 mins IRL.
He was running like hell all the time. I went up high trying not to be spotted by him but he never stopped.
Then he went in the middle of a tree+bush and vanished (i was having handling problems with the chopper, so that probably made it happen).
I've jumped, shooted and blown everything near the tree and bush, obviously with no sucess.
I guess there are just some several ways that scientists and suits can react (as for all the other npc).