There is no quest to pursue considering the hit out on your character. There will always be a note on the dead mercenaries when you kill them, regardless of your actions. As long as you have Good Karma or higher they'll come after you.
Depending on how you responded during a conversation with a certain character during the beginning of a quest there can be a
relation between the hits on you and that quest, but like I said there's nothing you can pursue. There should be too; but I guess they opted to go with this other quest that is in the game where you can kill the character who wants you dead, but not for that reason that he/she's trying to have you assassinated. Kind of missed potential if you ask me.
Btw, it's "Talon Company", not "Dark Talon".