Shortly after, at around 4 1/2 minutes, Etta will realize it is a setup and instruct her girls to flee. This will occur about 4 minutes into the mission and will be highlighted by a change in background music. As they search the yard the impostors will identify themselves until there is only one remaining target. Originally there will be four targets (women dressed as Etta).
Head to the large tunnel entrance directly ahead and hide yourself within. Once you gain control of your character you can begin timing the mission. Payouts increase with difficulty and when completed with posse members. Legendary Bounties award their maximum payout if completed 30 or more minutes after the mission start.