Federal Investigation Bureau/Dave Norton

Dave Norton sets up a meeting with Steve Haines that turns into an FIB-IAA shootout on the Kortz Center cliffs. Michael and Trevor escape with both groups gunning for them.
The Wrap Up is a mission in , given by FIB agent Dave Norton to protagonist Michael De Santa. Fellow protagonist Trevor Philips is also playable during a later part in the mission.
Michael and Dave meet at one of the lookout points at the Kortz Center as Dave was none too impressed with how Michael and Trevor attacked Merryweather and they have discussed things. Michael reminds Dave that the raid at the FIB headquarters was successful and insists that Dave honor the promise to let Michael and his friends go scot free, as part of the deal. Dave begins to explain that there has been a change of plans, but he is promptly interrupted by the arrival of Steve Haines and Andreas Sanchez; Haines orders Sanchez to arrest Michael and Dave so that he can cover up the raid on the FIB and satisfy his desire for revenge for his career record being completely ruined by Michael. A four-way occurs between the men. Dave attempts to talk them down. However, before they can lower their guns, a group of IAA agents, led by the U.L. Paper Contact, arrive and attempt to arrest all four of them. Almost immediately, a rival group of corrupt FIB agents also appear. Haines demands to know who sent the tactical team, and Sanchez betrays his boss by revealing that he is a double agent and that the FIB team is working with him. Just as Haines complains against the IAA about their corrupt crimes when the U.L. Paper demands everyone to surrender, the situation escalates further when a Buzzard Attack Chopper, operated by Merryweather mercenaries, suddenly arrives. The situation quickly explodes into violence; Haines gets shot in the leg by an FIB agent (the same leg he had shot himself in during the raid at Humane Labs and Research), and in turn, shoots and kills Sanchez in the process, leading to an all-out firefight.
Haines quickly escapes, leaving Michael and Dave behind to die. As Michael shoots his way out of the area towards Dave, killing as many FIB team and IAA agents as he can to help Dave, he gets separated from Dave and is left to fend for himself. But soon, another Merryweather helicopter, a Buzzard, appears and Michael must retreat to cover.
The player is then shifted to Trevor, who is hiding in cover at a vantage point across the museum. Trevor snipes the pilot of the Buzzard with a sniper rifle. He then makes himself known to Michael, who then asks if he has has come to finish him off. Trevor replies that he is not there to kill Michael at the moment, but he also will not allow the FIB or anyone else to deny Trevor the right to take his erstwhile partner's life, believing that only he has the right to decide Michael's fate. Trevor returns to the assault and provides support for Dave, taking out enemies in the musuem's courtyard while Dave crosses the area. Trevor complains why is he saving the man who killed Brad and would want to kill him next, before Michael explains that Dave is their only hope to get off the FIB's case now due to Haines' betrayal and escape after failing his attempted arrest. Dave assures Michael and Trevor that he will do his best to calm Haines down and reason with him in order to get Haines off their backs. Once Dave is in cover, the player can choose to continue as Trevor or return to Michael. As Trevor, the player must help Michael get down to the courtyard, clearing out FIB agents and another Merryweather helicopter. As Michael, the player must make their way down to the courtyard, fighting through FIB agents and Merryweather troops in order to reach Dave.
During the gun battle, Michael demands to know more about the FIB team that were sent here, Dave explains that they are a corrupt division that have either gone rogue or are on the IAA payroll (which could mean that those FIB agents are all double agents working with the IAA, even though they were sent by Sanchez). Trevor then wonders why are Merryweather involved in this three-way war, and Dave complains that his previous activities that involved stealing an experimental weapon, hijacking their plane and attacking their train have got them involved in their crimes and it will be difficult to avoid any more involvement in Merryweather's operations.
Once the player has completed these particular objectives, the player as Michael flees the museum with Dave. The FIB agent tells Michael that he will be in touch, then leaves. Michael must escape on his own, a process which involves either evading or destroying one final Merryweather helicopter. Trevor calls Michael to have a conversation in private, and suggests that Michael meet him behind a pawn shop in Morningwood.
Upon arrival at the pawn shop, the two argue. Trevor states that he no longer trusts Michael, but despite not forgiving Michael, states that he is still willing to play nice so that they can finish off their last big score, the Union Depository, after which, should they survive with the money, Trevor will happily get off Michael's back. The two call Lester Crest, who states he will start organizing the heist. Trevor threatens Michael a final time, then leaves.
Afterwards, Michael calls Dave, who explains that the affairs of the IAA will be dealt with using Sanchez as the scapegoat of the plot. However, Haines refuses to cooperate until Trevor is killed as a sacrificial lamb. Michael expresses reluctance to kill his former partner as he hangs up.