Detective Duck Prison Walkthrough: All Codes (2026)

Detective Duck’s Prison chapter is one of the trickiest cases in the Roblox detective game, with layered puzzles that take you from a birthday cake to a full jailbreak investigation. This complete detective duck prison walkthrough, updated for October 2026, covers every step in order: all keypad codes, puzzle solutions, and the correct suspect to vote for at the end.

Detective Duck prison walkthrough guide: Detective Duck investigating the prison — Detective Duck investigating the prison

New to the game? You can play the official Detective Duck game on Roblox for free, then follow this detective duck prison walkthrough step by step to clear the Prison chapter fast.

Detective Duck Prison Walkthrough: All Codes at a Glance

Here are the key codes you will need, so you can solve and move on:

A3 access keypad: 181881
Wire cutting order: Green, Blue, Yellow, Red
Office laptop: unique timed password from the INBOX computer (valid 30 seconds)
Correct suspect: the Receptionist

Step 1 of the Detective Duck Prison Walkthrough: Find the Grinding Tool

Head upstairs from the main prison floor. Look for a table or shelf holding a chocolate cake with a “Happy Birthday!” note. Click the cake and a Grinding Tool will appear beneath it. Pick it up.

Step 2 of the Detective Duck Prison Walkthrough: Break Into the Staff Only Cell

Go back downstairs and find the locked cell door marked “STAFF ONLY” (the rustic door on the right side). Use the Grinding Tool on it to break it open and step inside.

Step 3 of the Detective Duck Prison Walkthrough: Solve the Maze Poster Code

Inside the cell, examine the poster behind or beside the toilet. It shows a maze pattern with six arrows in sequence: Down, Right, Down, Right, Right, Down.

Now equip your Magnifying Glass and check the prison walls for writing under the window. It gives you the conversion key: Down = 1, Right = 8. That turns the arrow sequence into the code 181881.

Step 4 of the Detective Duck Prison Walkthrough: Open Cell A3

Find the A3 access keypad to the left of the stairs, near the Staff Only area. Enter 181881. You will see the message “A correct code has been entered” and the cell opens.

Step 5 of the Detective Duck Prison Walkthrough: Get the Blue Keycard

Go back upstairs and turn left to the end of the path, where you will find a red plunger on a table or shelf. Take it back to the unlocked Cell A3 and use it on the toilet. A blue keycard appears inside. Collect it.

Step 6 of the Detective Duck Prison Walkthrough: Enter the Cafeteria

At the cafeteria entrance, use the keycard on the reader beside the door. The reader shows “ACCEPTED” and you can walk in.

Step 7 of the Detective Duck Prison Walkthrough: Make the Acidic Tomato Juice

Collect the 4 red tomatoes scattered around the cafeteria. Then go upstairs to the right side of the cafeteria, find the blender, place all 4 tomatoes inside, and activate it. The mixture turns green and produces a jug of acidic tomato juice.

Step 8: Melt the Box and Cut the Wires

Find the metal box labeled “NOTICE AUTHORIZED PERSONNEL ONLY” on a prison wall. Pour the acidic juice on it to melt the cover, which reveals colored wires. Grab the scissors from the storage shelves at the back of the cafeteria, then cut the wires in this exact order: Green, Blue, Yellow, Red. A nearby metal gate opens.

Step 9: Get the Denim Dan Cell Key

Enter the new area and collect the Denim Dan Cell Key from a corkboard. Use it to unlock the cell labeled “Denim Dan.” Inside, study the 3×3 grid on the wall and note which positions have checkmarks rather than X marks.

Step 10: Open the Staff Only Office

Find the keypad with a 3×3 grid beside another “STAFF ONLY” door. Press the buttons matching the checkmark positions from Denim Dan’s cell. The buttons turn green, the door opens, and you can enter the office.

Step 11: The Timed Laptop Password

In the office, click “I forgot my password” on the laptop login screen. It tells you to “CHECK YOUR INBOX.” Head to the security room back in the wire area and read the “INBOX” computer monitor. It displays a unique password that is only valid for 30 seconds. Sprint back to the office laptop, enter the password, and click SUBMIT. You will get “GRANTED GATE ACCESS” and the large garage door to the outside yard opens.

Step 12: Solve the Case and Vote

Open your case file for the investigation phase. There are five suspects: the Janitor (mud on his boots), the Cook (the blender smells of chemicals and the kitchen shears are missing), the Tech Guard (controls the gate system but was found sleeping), the Receptionist (handled visitor check-ins and inspected the cake), and Granny (who brought the chocolate cake).

The key evidence is a crumpled emergency note in the security room: a granny brought a suspicious cake that day, the Grinding Tool was hidden inside it, and the Receptionist inspected and approved the cake’s entry, giving her both the access and the opportunity to enable the escape.

Equip your phone, choose “END INVESTIGATION,” and vote for the Receptionist. “Well done, Detective. You caught the right suspect.” Her charges: aiding and abetting a mass jailbreak, smuggling contraband, and corruption and bribery. This detective duck prison walkthrough ends the same way every time: the Receptionist is guilty.

If you enjoyed cracking this case, our Detective Duck: The Suburbs walkthrough covers the first chapter step by step, and our Demonology Roblox beginner guide is another mystery-hunting Roblox game worth trying.

Detective Duck prison walkthrough case file: suspect screen in Detective Duck — Case file suspect screen in Detective Duck

Frequently Asked Questions

What is the keypad code in Detective Duck Prison?

The A3 access keypad code is 181881. You derive it from the maze poster arrows (Down, Right, Down, Right, Right, Down) combined with the wall writing that maps Down to 1 and Right to 8.

What order do I cut the wires in Detective Duck Prison?

Cut the wires in this order: Green, Blue, Yellow, Red. You need the scissors from the cafeteria storage shelves first.

Who is the culprit in Detective Duck Prison?

The Receptionist. She inspected and approved the cake that smuggled the Grinding Tool into the prison, which enabled the jailbreak.

How do I get the laptop password in the Prison office?

Click “I forgot my password” on the office laptop, then read the INBOX computer in the security room for a unique password. It expires after 30 seconds, so run back quickly.

Bookmark this detective duck prison walkthrough for October 2026 so you can find every code again when you replay the chapter.

Axee Davies

Axee Davies is the founder of AxeeTech, publishing gaming guides, codes, and Windows how-tos since March 2013. A tech enthusiast for 13+ years — starting with smartphones and Android rooting — he now runs a site that puts out a new guide every day for Roblox players, traders, and Windows users. More about AxeeTech

axeetech.com