A guide to finding all six missing persons, tracking down the Finger Paint Killer and unlock the Darkness Looms achievement.
As with other side missions, it doesn't matter which order you solve these investigations as the audio logs play out in sequence.
There are six missing person investigations to solve and they become available after you complete the Backstage Pass mission in Act 1 or when you discover your first body. Each body location should show up on your map as a magnifying glass although you may need to unlock ctOS Towers in the area.
Once you've discovered the bodies and played the audio logs you'll need to complete Hope is a Sad Thing to unlock the bonus mission. Once that's finished you'll earn the Darkness Looms trophy or achievement.
Missing Person 1: Chelsea Armstrong - Brandon Docks
You'll find Chelsea's body on the south side of the bridge. Get on over to the water and you'll see a back area hidden underneath. Climb up to find the audio log and the corpse.
Missing Person 2: Debora Ingram - The Loop
Get in a boat and sail out to the small island just off the east coast of the map. Inside a shed on the north east of the island you'll find body and the audio log.
Missing Person 3: Claudette Rousseau - Brandon Docks
Now sail your boat to the south side of Brandon Docks and head into one of the canals to the north of where the body is. The body and the audio log are on the second floor of a fire-damaged factory.
Missing Person 4: Kate Quigley - Parker Square
Use fast travel to get to the hideout to the south (after you've unlocked the ctOS Tower in the north part of Parker Square). Grab a vehicle and follow the tracks north until you reach the tunnel. Inside you'll find a body and the audio log.
Missing Person 5: Alicia Freidkin - Pawnee
Go to the northwest end of Pawnee and look for a train car. Inside you'll find the audio log and the body.
Missing Person 6: Annie Nelson - Pawnee
Find the dirt road just east of the trailer park in Pawnee. If you've got a dirt bike it's a little easier to get there, where you'll find the audio log and Annie lock in a cage.
Crie for Your Daughter - Eliminate the Finger Paint Killer
Now you can bring down the Finger Paint Killer. Get to the trailer park to start the mission and get your phone out. Go towards the dry swimming pool and you should see the Finger Paint Killer standing along the fence near the pool. Approach from the east and stay behind the trailer while the killer stalks... but don't intervene until his profile turns red.
You phone will profile the killers as one Edgar Noone. Take him down quickly with a few shots to the head and then hack his phone. You have now unlocked the Chrome pistol and the Darkness Looms trophy/achievement.