DETECTIVE OS
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Case 404: The Silence of Blackwood Manor
A locked room. A dead lord. And a truth someone wanted to bury.
🔗 Connected to Case 405 → Click to SolveCase 405: The Heir Who Never Died
A missing heir. A hidden truth. And a murder that reveals more.
🔗 Sequel to Case 404 → Click to SolveCase 406: The Last Passenger
A train arrives at its final station. Every passenger leaves — except one.
Independent Case → Click to Solve.png)
At 11:43 PM, the lights went out. Fifteen minutes later, they returned. Lord Edmund Blackwood was dead.
He was found inside his locked study. The door was locked. The window was locked.
Four people were inside the manor. Earlier that evening, Lord Blackwood had made one announcement:
“At midnight, I will reveal the truth about Thomas Vale.”
Nobody knew what that meant. But before midnight—someone made sure he would never speak again.
Your mission: Find the killer.
📁 CASE FILES — Case 404: The Silence of Blackwood Manor
THE VICTIM
Lord Edmund Blackwood (Age 62, Industrialist, Status: Dead)
Lord Blackwood was wealthy, powerful, and feared. Twenty-five years earlier, a factory worker named Thomas Vale died in a supposed accident at Blackwood Industrial Works. Tonight, Lord Blackwood planned to reveal the truth. He never got the chance.
Cause of Death
Poisoning. The poison: Aconitine.
THE SECRET
A partially burned letter was found in the fireplace. Only one sentence could be read: “You took everything from me.”
Another document revealed that Lord Blackwood was planning to change his will. His nephew, Julian, would inherit nothing. Someone else would receive everything.
🔍 EVIDENCE — Case 404: The Silence of Blackwood Manor
01 — THE POISONED DRINK 🥃
Aconitine was found in Lord Blackwood's brandy glass. But the bottle itself was clean. The poison was added after the drink was poured.
02 — THE SECOND GLASS 🍵
An empty glass was found nearby. It contained traces of sugar and lavender. Only one suspect was known to regularly use lavender sugar.
03 — THE BROKEN WATCH ⌚
Lord Blackwood's pocket watch was found beneath his desk. It stopped at 11:47 PM because it struck the floor during a struggle.
04 — THE CLEAN KEY 🔑
The study door was locked from the inside. The key was found on the floor, but it was completely clean despite the dusty floor.
05 — THE FOOTPRINT 👣
A footprint was found outside the study window, but heavy rain had been falling for hours. The footprint was completely dry—it was planted.
06 — THE COAT BUTTON 🔘
A button matching Julian's coat was found beneath the desk, but the attached thread was dry. Was Julian inside, or was someone framing him?
⏱️ TIMELINE — Case 404: The Silence of Blackwood Manor
- 7:30 PM: Suspects arrive; storm begins.
- 8:15 PM: Dinner begins; Blackwood appears nervous.
- 9:05 PM: Blackwood announces: “At midnight, I will reveal the truth about Thomas Vale.”
- 9:30 PM: Julian argues with Blackwood: “You can't take everything from me!”
- 10:22 PM: Clara enters the study, leaving 7 minutes later visibly upset.
- 10:40 PM: Blackwood enters his study with brandy.
- 10:55 PM: Mrs. Graves visits the study; claims Blackwood was alive.
- 11:25 PM: Dr. Vale leaves drawing room, claiming he went to his bedroom.
- 11:43 PM — BLACKOUT: Manor goes dark for 15 minutes.
- 11:47 PM: Loud crash; watch stops.
- 11:51 PM: A woman screams.
- 12:05 AM: Door forced open; Blackwood is dead.
👥 THE SUSPECTS — Case 404: The Silence of Blackwood Manor
JULIAN BLACKWOOD
Age 29, Nephew. Charming, reckless, and deeply in debt. Planned to be removed from the will.
CLARA WHITMORE
Age 34, Family connection. Quiet, intelligent, returned after 20 years. Loved Blackwood's missing son.
DR. ADRIAN VALE
Age 42, Personal Physician. Calm, trusted, but hides his true identity as Thomas Vale's son.
MRS. ELEANOR GRAVES
Age 51, Housekeeper of 28 years. Knows every room, key, and dark secret.
🎙️ LIVE INTERROGATION — Case 404: The Silence of Blackwood Manor
Select someone to interrogate (8 Questions max):
INTERROGATING: NAME
📝 Notes
⚖️ FINAL VERDICT — Case 404: The Silence of Blackwood Manor
WHO KILLED LORD BLACKWOOD?
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A letter arrives for the detective containing an old photograph showing Lord Blackwood beside Arthur Blackwood, his missing son who disappeared twenty years ago.
Before you can investigate, the sender is murdered and the photograph disappears. Who killed the man who knew the truth?
Your mission: Solve Henry Collins' murder.
📁 CASE FILES — Case 405: The Heir Who Never Died
THE VICTIM
Henry Collins (Age 58, Former Solicitor, Status: Dead)
Managed family documents for 30 years and sent the photograph proving Arthur was alive. One hour later, he was found dead inside the archive room.
Cause of Death
🔪 A single stab wound. The photograph was gone.
THE SECRET
Before his death, Henry wrote one sentence: “Arthur was never the enemy.”
🔍 EVIDENCE — Case 405: The Heir Who Never Died
01 — THE MURDER WEAPON 🔪
A letter opener with Henry's blood was found behind a bookshelf. It belonged to the archive room; the killer brought no weapon.
02 — THE TORN PHOTOGRAPH 🖼️
One corner of the missing photo was found in the fireplace, showing Arthur wearing the family ring.
03 — THE BLACK GLOVE 🧤
A black glove with a small gold thread caught inside was found beside Henry's body.
04 — THE STOPPED CLOCK ⏰
The archive clock was deliberately stopped at 10:16 PM to create a false time of death.
05 — THE LOCKED ARCHIVE 🔐
The archive door was locked, but Henry knew all three keyholders. He opened the door willingly.
⏱️ TIMELINE — Case 405: The Heir Who Never Died
- 8:00 PM: Henry announces he has proof Arthur is alive.
- 8:30 PM: Julian demands documents; Henry refuses.
- 9:00 PM: Clara receives anonymous letter and leaves.
- 9:20 PM: Mrs. Graves seen near archive corridor.
- 9:45 PM: Henry tells detective truth will be known before midnight.
- 10:05 PM: Henry enters archive.
- 10:16 PM: Archive clock deliberately stopped.
- 10:20 PM: Victor Hale seen entering corridor.
- 10:25 PM: Scream heard; Henry Collins found dead.
👥 THE SUSPECTS — Case 405: The Heir Who Never Died
JULIAN BLACKWOOD
Age 29, Nephew. Reckless and in debt. Loses inheritance if Arthur is alive.
CLARA WHITMORE
Age 34, Former Lover. Believed Arthur abandoned her 20 years ago.
MRS. ELEANOR GRAVES
Age 51, Housekeeper. Knows more about Arthur's disappearance than she admits.
VICTOR HALE
Age 47, Fired Estate Manager. Returned unexpectedly on the night of the murder with damaged gold stitching on his coat.
🎙️ LIVE INTERROGATION — Case 405: The Heir Who Never Died
Select someone to interrogate (8 Questions max):
INTERROGATING: NAME
📝 Notes
⚖️ FINAL VERDICT — Case 405: The Heir Who Never Died
WHO KILLED HENRY COLLINS?
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The Midnight Express arrives at its final station. The passengers leave. One passenger does not. A man sits alone in Cabin 7. He is dead—and medical examiners confirm he died nearly three hours before the train arrived.
Your mission: Find the killer who placed him on the train.
📁 CASE FILES — Case 406: The Last Passenger
THE VICTIM
Edward Harrow (Age 48, Investigative Journalist, Status: Dead)
Edward exposed corruption. Before boarding, he told a colleague: “By tomorrow morning, someone's career will be over.” His briefcase was found empty.
Cause of Death
🔪 Single stab wound between 8:15 PM and 8:30 PM, before the train departed.
🔍 EVIDENCE — Case 406: The Last Passenger
01 — THE EMPTY BRIEFCASE 💼
Contained only a train ticket; documents were missing.
02 — THE STOPPED WATCH ⌚
Edward's watch stopped at 8:22 PM from blood and impact.
03 — THE RED THREAD 🧵
Found in victim's hand, matching a suspect's red scarf.
04 — THE COFFEE CUP ☕
Half-finished, warm coffee placed beside victim after departure.
05 — THE MISSING BUTTON 🔘
Railway employee brass button found beneath Cabin 7.
⏱️ TIMELINE — Case 406: The Last Passenger
- 7:50 PM: Edward arrives at station, arguing.
- 8:05 PM: Meets woman with red scarf in café.
- 8:15 PM: Loud argument near luggage room.
- 8:22 PM: Edward's watch stops.
- 8:30 PM: Luggage trolley with coat-covered trunk pushed toward Platform 4.
- 8:45 PM: Midnight Express departs.
- 11:40 PM: Train reaches final destination; Edward found dead.
👥 THE SUSPECTS — Case 406: The Last Passenger
MARA VOSS
Age 36, Politician's Assistant. Controlled and private; Edward investigated her employer.
SAMUEL REED
Age 52, Railway Conductor. Had access to Cabin 7; uniform recently repaired.
LEO HARROW
Age 27, Unemployed Victim's Brother. Owed Edward money; argued earlier.
ELIZA MORROW
Age 44, Station Café Owner. Served coffee; lied about closing time.
🎙️ LIVE INTERROGATION — Case 406: The Last Passenger
Select someone to interrogate (8 Questions max):
INTERROGATING: NAME
📝 Notes
⚖️ FINAL VERDICT — Case 406: The Last Passenger
WHO KILLED EDWARD HARROW?