Several of his co-workers and elite banking industry colleagues met Stoney as his lady.
Stoney used the getaway mobile phone to lore him out of the bank during the robbery.
I think the idea that people can get caught up in unfair circumstances would have been slightly more pungent if he got canned in the same way as Frankie.
Could be assumed the police didn't disclose the names of all the robbers. Especially since it's shown at end that the male cop see Stoney on bus but decides not to go after her (realizing the chain of events started with Police shooting her brother).
So only ones the bank perhaps thought were involved were those whom were killed (i.e. 3 women which was how they always went in to rob the banks). So Keith's colleagues perhaps didn't have a clue she was in any way involved. Especially since they didn't take off the mask till the bank was cleared and they had the gun shoot out w/ cops and the banks security guard.