Although Hannah and Caroline graduated at the same time, she was several years older than Caroline and the same as Wang Su, so her thoughts and demeanors were much more mature and stable than Caroline.

At this time, Hannah got up and walked to Wang Su's side, and stretched out her hand to him generously: "It's a pleasure to meet you, my name is Hannah, I am an agent of the Eastern District Bureau, I hope we can cooperate happily." ”

Caroline sweated at Hannah's move, unsure if Wang Su would follow basic social etiquette. With her understanding of Wang Su......

Suspend.

Sure enough, I saw Wang Su look blankly at Hannah's outstretched hand, without the slightest intention of holding it, and lit a cigarette by himself, indifferent.

"......" Zuo Ling looked at Hannah sympathetically, empathizing with her experience.

The atmosphere suddenly became awkward.

But Hannah, who was ignored, was not angry at all, but maintained a smile and said: "It seems that Expert Wang has his own style of acting, it seems that I am presumptuous." ”

Wang Su continued to smoke his cigarette, and even furrowed his brows, looking extremely impatient.

"Hehehe......" At this time, James laughed dryly, wanting to break the embarrassing atmosphere, "Wang Su, this Agent Hannah is the original person in charge of this case, so she must know more about the details of this case, I think it will be helpful for her to join in the investigation of the case." I've also learned about Agent Hannah's work attitude in the past, and it's still very ......."

"What did you tell me for?" Wang Su suddenly interrupted James's words, "Can you stop wasting any more time and start dictating the case to me right away?" ”

"And..."Wang Su looked up at Hannah, "don't call me any Wang expert, if we need to call each other, just call me Wang Su." ”

"No problem." Hannah heartily agreed, and returned to her seat with a polite smile.

Caroline whispered to Hannah, "Hannah, have you seen it?" This weird temper can drive people crazy. ”

Hannah covered her mouth and whispered, "I think it's okay, as long as he can help us solve this case, I'm not angry." ”

At this time, Kevin, who had not spoken, finally couldn't stand the embarrassing atmosphere, only to see him clap his hands and say, "So...... Let's get straight to the point, everybody? Agent Hannah, Wang Speed Him... I'm not very accustomed to going through the file by myself, so I would like to ask you to dictate to him the basic situation of the case. ”

Caroline rolled her eyes when she heard this, and secretly said in her heart that Wang Su was not used to reading the file by himself, he was just lazy!

"Okay, no problem!" Hannah readily agreed again and opened the case.

"At 6:21 a.m. on November 3, 2008, we received a report of a homicide in a single-family home in the Coral Pavilion neighborhood of Miami. When they arrived at the scene, they found that the back door of the community's No. 171 house was open, a man was lying on the ground not far from the door, and a woman was lying on the bed in the bedroom on the second floor, both of whom were dead. ”

"Wow...... The Coral Court community? Wang Su shrugged, "That's the rich area." ”

"Yes." Hannah nodded.

Wang Su asked, "What about the autopsy?" ”

According to the forensic examination, the time of death of the two was around 12 o'clock in the morning. Both bodies had their throats cut open with a sharp gas, and both had a cork of a red wine bottle stuffed in their tracheal incisions, and the cause of death was suffocation. In addition, spotted burn marks were found on the necks of both bodies, presumably caused by civilian self-defense shockers. ”

"First the electric shock makes the person unconscious, and then the trachea is cut and the cork is inserted?? Interesting...... "Wang Su raised the corners of his mouth, as if his interest had been mobilized, "How can such a complicated operation be used to achieve the effect of suffocating people?" So, what about the results of the on-site trace inspection? ”

Hannah shook her head with regret on her face: "There are no traces of a fight at the scene, there is no large amount of blood, no murder weapon was found, and no biological samples of the murderer were found in the body or at the scene." Only a few meaningless footprints were found. ”

Wang Su frowned and asked, "Meaningless footprints?" What do you mean? ”

"Yes, it doesn't make sense. The result of our analysis is that the soles of the murderer's feet were prepared in advance and wrapped in thick cotton and other items, so the footprints left are oval-shaped, and it is impossible to analyze the height and weight of the murderer and his walking characteristics. ”

Wang Su touched his chin and nodded slightly, stared at the table for a moment of contemplation and asked, "There is no large amount of blood at the scene?" The murderer simply cut the trachea with a knife without injuring the large carotid arteries on both sides? ”

"Yes."

"Hmm......" Wang Su kept nodding, "Very professional!" ”

"Very professional??" At this time, Caroline questioned, "Hey, detective, if the murderer is very professional, then he should kill the victim in the most crisp and fast way." Like what... With a pistol with a muffler? ”

Wang Su sneered, and glanced at Caroline, who was full of questions from the corner of his eye: "For premeditated homicides, it is often unprofessional to use guns." bullets, with ballistic analysis to track firearm information; Although the pistol is equipped with a muffler, it is not completely devoid of the sound of shooting, and there is a possibility that it will be heard by neighbors; The muzzle flare, in the middle of the night, may also be observed by the opposite neighbor from the window. ”

Caroline seemed unwilling and asked, "That... Since the victim has been electrocuted, why didn't the murderer directly cut the arteries with a knife, but instead cut the trachea so troublesomely and then stuffed the cork into it? ? Even if the murderer has to cause the effect of suffocation, then he can directly cover the victim's mouth and nose with a pillow? ”

Wang Su spit out a puff of cigarette and said leisurely on his back: "Although cutting arteries or stabbing the heart with a knife is fast, the murderer will inevitably be splashed with blood. If you look at the homicide cases of the Crime Division over the years, you will know that the more professional the murderer, the cleaner the crime scene, because they understand that the more blood stains mean the greater the possibility of leaving traces and clues! And suffocate with a pillow over your mouth and nose?? Please, have you watched too many movies, do you know how hard it is? If that is the case, the victim is likely to wake up and put up a violent resistance and get into a fight with the killer. And if there is a fight, there will be a lot of movement in the house, do you think the murderer would take this risk and use such a stupid method? ”

Hearing this, Kevin immediately asked, "What about cutting the trachea??" I think a person with his trachea cut can wake up, right? ”

"Yes!" Wang Su snuffed out the cigarette butt, "But the victim has lost the ability to make a sound due to tracheal incision, and will be in a semi-coma state of hypoxia in the brain due to insufficient oxygen inhalation." Therefore, the victim could not scream and did not have the strength to resist, so he could only let the murderer unhurriedly stuff the cork into the incision, resulting in a complete blockage of the trachea and a silent death. ”

Wang Su stood up and paced back and forth: "In short, although the murderer's choice of this way to commit the crime seems complicated, it is the most difficult way to leave clues and traces, and it is also the easiest way. And in fact he has achieved this effect. Well...... This man is very professional! ”

"Homicide without a trace...... Caroline and Kevin exchanged glances, lost in thought.

Wang Su continued: "I'll try to restore the process of committing the murder. There are two possibilities for a man to die in the doorway and a woman to die in a bed. One is that the murderer knocks on the door, the male opens the door, and the moment the door is opened, the male victim is stunned, and then killed, and then the murderer enters the bedroom and kills the female. The second is that the male victim returned late that night, and the murderer unlocked and entered through technical means, first entered the bedroom and killed the sleeping woman, and then waited in ambush inside the door for the male to return, and killed him immediately after the man opened the door. I'm more inclined to the second possibility, after all, knocking on the door in the middle of the night will alert the victim in advance. ”

"Yes, according to the investigation that year, the male victim drank with his friends in a bar that night and did not return until late at night." Hannah looked at Wang Su with more admiration in her eyes, and she was surprised that Wang Su could easily get the information that their Eastern District Bureau had spent several days investigating in just a few minutes.

"Well, at least in terms of modus operandi, the murderer is quite professional. So... What about the trajectory of the murderer?? What about the surveillance video data at the main entrances and exits of the community and on the roads within the community? ”

Hannah flipped through the dossier and replied, "Come without a trace, go without a trace!" ”

Wang Su almost fell when he heard this: "I said beautiful detective, what are you playing??" Let you say that the original monitoring data investigation situation, did not let you publish a conclusion!! ”