The Devil is in The Details

Start at Devitt's ferry and progress to three crime scenes. Two are near the start, the third is far away.

Take the letter, then lure the first guard with McCoy's bag. Take him down and tie him when he's out of Poncho view.

Sneak ahead with McCoy, lure and defeat the guard near the car. Use Hector to throw the tied guard into the Poncho's view. When the Poncho climbs down the ladder, follow him with McCoy and take him down.

Lure the Gunwoman to the ferry by throwing McCoy's bag in her sight. Once she's on the ferry, defeat her if she sees a downed guard.

Proceed through the gate to the first crime scene near Pier 9.

Enter the pier area, take down the first guard. Grab him with Hector and get close to the Poncho. Wait for the Long Coat to talk with the Poncho, then throw the tied guard at the enemy. Tie him and wait behind the cargo.

The Long Coat will patrol and see the tied guards. Wait in the blind spot and take him down when he tries to free them. Throw a tied guard into the view of the Poncho near the boat to lure him, defeat him, and whistle to lure the Gunman. Repeat the strategy to take down the Poncho.

Hide in the bushes and whistle to lure the Gunman outside the wooden fence. Take him down and throw him to lure the Poncho near the barrels. Take down remaining enemies on the pier and proceed to the street.

The crime scene is ahead, but civilians are present. Lure civilians one by one behind the wagon, tie them, and then use Hector and McCoy to take down the two enemies near the corpse. Interact with the body. Interact with the pig's body for lore.

You will get a hint leading to Florence Smolker's oriental Spices, the building in front of the red lantern. Unlock the door and enter to complete an objective.

Return to the pier for the second crime scene. Take down the Poncho on the street and leave him tied near the corner. Whistle with Hector to lure the next Poncho and defeat them.

Run to cover (press the cover button to crouch behind walls or objects) behind the car, then advance when the Poncho looks away. Walk to the street and knock out the sleeping bandit. Grab him and leave him near the platform with the steamer wheel. Whistle to lure nearby bandits.

Grab one guard and throw him on the platform, then throw him onto the bandit fixing the wheel. Interact with the wheel to make it fall, killing two enemies. Ensure the bandit on the far right sees the accident. When he's in range, whistle to lure him to the tied guards and take him down.

Throw a guard onto the Poncho while a bandit looks away. Go to the boat, run to stay out of the Long Coat's view, then jump on the boat and defeat him. Interact with the body for more information.

Return to the street and head to the final crime scene. Take down the first guard. There are two guards on the balcony and one on the roof. Rush to cover behind the wagon and enter the building to get to the other side.

Defeat the Gunwoman in the corner while the patrolling Long Coat is far away. Coordinate an attack to take down the Long Coat and the Poncho simultaneously. Knocking down the civilian next to the horses is recommended.

At the last crime scene, whistle to lure a civilian outside, take him down, and throw him into the view of the guard at the end of the street, then take him down.

Snipe the Poncho on the balcony. Position Hector in the side street, whistle to distract the Poncho, then rush and take him down. Throw McCoy's bag to lure the guard and send Hector to defeat the Long Coat.

After defeating enemies, investigate the corpse. You will need to kill the chickens around. If low on ammo, grab more near the car. Shoot the chickens until you find the next evidence.

After completing all objectives, the Murderer will appear at the Cafe Chez Manu. He is a Long Coat surrounded by dogs.

Proceed through the street and enter the building. Go to the roof and defeat the enemies there. Whistle to lure the first guard outside, then take him down. As the Long Coat passes the tables, throw McCoy's bag to lure the bandit, take him down, and hide him in the bushes before the Long Coat returns.

Approach the Murderer: Option 1: Throw McCoy's vial of gas to stun the dogs and make the Long Coat fall to his knees, then finish him with Hector. Option 2: Shoot the dogs with Hector's shotgun to dispatch them instantly, then kill the Long Coat.

After killing the murderer, the mission will be completed.