"It can't be, Mr. Detective. Scott flatly denied it, "It doesn't make sense, if Bob wants to kill Professor Lucio silently, he needs to have drugs and wires to stun him, but every flight attendant will also go through a strict security check before getting on the bus, so that as long as you check the security records, you will be found, but Bob is obviously not such an impulsive and stupid person." ”

"Foxes never show their tails easily. He's so much smarter than you think, Mr. Scott. Caitlin smiled faintly, "Didn't you notice that everything you just said has already appeared?"

"When?" Scott began to rack his brain through his memory, the wire—*—the wire—*, the clue that led him back to a square table—"guitar, I have him with me." "—"Women's personal clothing, three sleeping pills, do you still need to check it yourself?"—the scene of Vincent and Miss Ollie's statement gradually came to Scott's mind. Scott couldn't help but blurt out, "It's them! Vincent and Ms. Ollie!"

Eric pulled out two photos. One is Vincent's guitar, and when zoomed in, you can see that the thinnest treble string of this guitar has a small section of jet-black after the iron has been overfired. Another photo shows four connected sheets of sleeping pills in Ms. Ollie's package, but one of the foils is empty. Eric added that only a check of the security records would confirm that she must have had four sleeping pills in her package before getting into the car.

Scott looked at the photo carefully, he never imagined that his men and passengers would become murderers. But he still wanted to make a final death throe: "But why would Bob put his two accomplices in the same carriage, wouldn't it be too easy to get through the gang?"

A dry-mouthed Eric poured himself a glass of brandy. Caitlyn then explained, "Actually, it's the hardest thing to wear in a car. If the two of them were too spacious, it would be difficult for Bob to return the removed strings to Vincent. And when he commits a crime, he also needs cover, and at least one person has to wind up the corridor of the carriage to increase the success rate of the crime. At the same time, when the fire alarm goes off, it is best to have someone who can help him buy him more time. So Vincent and Miss Ollie's room was on either side of Professor Lucio, and they were both seated close to the door. ”

Eric finally connects all the suspicions: Bob, as a flight attendant, learns that Professor Lucio will be on today's train to Paris, so he informs Vincent and Ms. Ollie as soon as possible. Due to the fact that the train occupancy rate was not high today, they could easily have bought car number three in the same car as Professor Lucio. After Bob gets Ollie's sleeping pills, he pretends to give Professor Lucio a drink. Because of his status as Bob's flight attendant, Professor Lucio, who lived a simple life, drank the glass of sleeping pills unsuspectingly. After estimating the effect of the drug, Bob went into room 303 and killed him, and then set up the scene in the same way as before. When the fire alarm sounded, Bob, who had been preparing on the side of the carriage, immediately rushed to the door of room 303, pulled the silk thread hidden under the carpet, pulled the burning corpse behind the door, and then pulled out the thread and hid it on his body, pretending to be the first to arrive at the scene, and then took advantage of the chaos to return the guitar strings that were used as steel wires to Vincent. In the end, all three pretend to be three strangers who don't know each other, so that a silent murder in a closed room can be brought to a perfect end.

"But - why did they kill Professor Lucio. Scott looked at the incredible Eric in admiration, "Bob was just a flight attendant, and the deceased was a big professor, and as far as I can tell, the two don't seem to have anything to do with each other." ”

"Does Bob have a baby?" asked Eric.

"Yes, a lovely eight year old girl. Scott looked sorry, "The piano she plays is wonderful." ”

"I think the motive for the three of them may be this. Eric showed Scott the news report that Professor Lucio had stopped for "Unforgettable Children's Voices," "but what made them hate Professor Lucio to such an extent depends on the French police." ”

After Scott left, Chiko asked puzzledly, "I don't understand why Bob closed the door when he first came to us, it was this insignificant act that made you notice him." ”

Bob, Vincent, and Ms. Ollie work together to complete the murder in the locked room, but Bob is the only one who actually completes the murder. As an ordinary flight attendant, he doesn't have the calmness and courage of a professional killer. I think when he first came, he had already killed Professor Lucio. He came to our room just to make sure we heard something unusual, and it was this subconscious desire not to cause any movement that made him make the superfluous gesture of closing the door. It's just that he was lucky, and he happened to find Leonardo a good reason to smoke a cigar. Eric glanced at Leonardo, who was still snoring.

"And what about the second time?" Chiko continued.

"I think it should be when I visited room 303, Scott was in the room to set up a secret room murder scene, maybe he saw my trace through the crack in the door, it should be because his highly vigilant mental state made him extremely sensitive to any small movement, in short, he noticed the unusual movement outside the door, so he asked Ms. Ollie to go into the corridor to investigate the situation, and happened to see us......" Eric recalled the nervous kiss, although he was beaten again, but his heart was still good," So after he had set up the scene of the secret room, he cautiously came to us again. I think he must have been outside the door for a moment, and heard the sound of me being thrown to the ground, which again found a perfect reason for him. ”

Chiko carefully considered it, this carriage has a total of 5 carriages, of which rooms 304 and 302 have his accomplices Vincent and Ollie, so that he can know the movements of the passengers in these two rooms in a more timely manner. But what about room 305? Room 305 is only Mr. Sandys. Chiko expressed the doubts in her heart.

Eric switches to a 305 photo: "Judging from this photo, with a laptop and a bunch of scattered documents on the desktop, I think the project manager is so busy working on the project that he doesn't care about what's going on outside the room. And I asked Mr. Sandys, and Bob had been to his room. I think Bob also saw Mr. Sandy's busy look, and the cheerful chatter of the two ladies in the next room reduced his worries. ”

"CONGRATULATIONS, CASE CLOSE, DETECTIVE. Caitlyn's eyes were filled with a surprising warmth, so charming that Eric did not dare to look at them directly.