One day, in the interstellar space near the system "Calibri"...
The battleship B15, controlled from the control ship and flagship "Wielder", has just destroyed an opposing control ship with a long-range shot from a range of 1 light-second, killing all its crew. The crew of the Wielder rejoiced in delight. Now there are only 3 control ships left to destroy, and for them, victory is near.
"The captain's dead! The captain's dead!",
shouts someone from the bridge into a microphone, which catches it and spreads it all over the ship.
The delight of the surprised crew turns into panic, as the alarm sounds loudly. The guards rush to the bridge. They don't find the murderer, but they meet the two announcers.
"Where is he now?" asks a guard to the announcers.
"In the dining room."
"Did you see how he died?"
"No, we were outside and had no idea about it. We were surprised too!"
The guards call the medical staff. Within a minute, they come fully equipped with many sorts of tools.
"From his body's condition, what we can obtain is that he died of poison," says the chief forensic.
"Poison?" say the guards, surprised. "We have no poison here, how can he be poisoned? A boarding attack? The ship's shields are still up and working!"
"The kind of the poison is new to us, too. We think he's been murdered."
The guards call the detective.
"Tell me, what was the captain doing?"
"The captain was drinking tea in his dining room, as always. Neither of us accompanied him, nor did any other crew member."
"How often does he do so? I mean, without company?"
"Every day. I mean, those clocks show the same time every 24 hours, don't they? He tells us to exit."
"Did he show signs of depression or sadness recently?"
"Not at all," says one of the announcers confidently, "let alone after that control ship was destroyed!"
"So yes, the captain has been murdered," concluded the detective, "escort me to the surveillance room."
Later, in the surveillance room...
"Hey! Why are you sleeping on your job? The captain's been murdered!"
The surveillance officers are fast asleep. The guards wake them up manually.
"What? Guards? What's going on?"
"The captain's been murdered! Why were you asleep?"
"Asleep? What?? The captain was murdered??"
Suddenly another guard exclaims, "I've found something!"
"A gas grenade? What really is going on??"
"Hey, this is a sleeping gas grenade! There's some kind of timing circuit too!"
"I think... they have discovered teleportation technology."
The detective and surveillance officers browse through the surveillance camera records. They find no instances of someone suddenly appearing. Furthermore, they didn't find anyone with a strange or unusual clothing.
"It was planned. Very planned," remarks the detective, "and their teleportation technology is very accurate. They can pick the right spot so that the murderer can kill a crew member and steal his clothing."
After a lot of work, the detective has found 3 possibilities:
- The first was dressed as a janitor. He wiped the chair and table on which the captain sat, and washed the cup used by the captain (and other cups and plates). He did so about 40 minutes before the captain was found dead.
- The second was dressed as a food inspector. He was inspecting the food in the dining room. He did so about 1.5 hours before the captain was found dead.
- The third was dressed as a water supply system engineer. He was caught on camera fixing a leak in the pipe which supplies water to the dining room. His body was such that the camera couldn't catch his tools. He did so about 5 hours before the captain was found dead.
He found nothing suspicious about that information. The janitor cleans on schedule, the inspector inspected on schedule, and the pipe actually leaked.
The three are brought before the detective for questioning.
"Do you know each other?"
They look at each other for a while and answer "no". Shortly afterwards, the second noticed the janitor was different. "Hey, you're not any janitor I've seen," the second says. "Perhaps he's a replacement?" the third says. "You're right, I was transferred from another ship. I replaced a janitor who died of a heart attack. This is the flagship anyway, I understand why I was brought here."
"What were you doing 20 minutes before the captain was found dead?"
The first answers, "I was cleaning a bathroom in the control section."
The second answers, "I was at my quarters, because I have completed the entire inspection schedule today."
The third answers, "I was fixing another leak, on a pipe supplying water to the quarters."
"Still inconclusive," thinks the detective. "Guards, call the other detective."
"You" are brought into action. You ask them, "Now I'm asking you all a question about this ship. What is the name of this ship?"
"Wielder," answer they nearly simultaneously.
"How old is this ship?"
The first answers, "15 or 16 years."
The second answers, "9 or 10 years."
The third answers, "It's 20 years old."
"How many guns does this ship have in total?"
The first answers, "About six thousand guns."
The second answers, "There are five thousand five hundred guns."
The third answers, "He was correct, there are five thousand five hundred guns."
The other detective then asks you, "What do you think? Is there enough information?
Who do you think is the murderer?"