Now thirty-six hours have passed since the incident, Lu Ke is standing in the office of the criminal police team looking at the whiteboard full of clues, and suddenly feels a headache.

What gave him a headache was not the rapid passage of time, nor the fact that there were no major breakthrough clues yet, but the fear that some of the clues in the case would slowly disappear with the passage of time.

In particular, this kind of homicide that occurs outdoors cannot be protected to the same extent as indoors no matter how much protection is provided at the scene of the crime.

Sometimes, a breeze is enough to make the slightest trace of the scene disappear in an instant.

At present, the various field investigation teams have been dispersed to investigate, but there will be no news in the short term.

Lu Ke picked up the board eraser and erased the clues about Yue Yushi on the whiteboard.

After a while, Lu Ke's phone rang, it was Wen Qiaoqiao from the laboratory department, she said that a pathology report came out, let Lu Ke take a look.

The technical team did not find any valuable biological samples at the scene of the crime, so this pathological examination report must have been carried out simultaneously with the autopsy.

That is, the laboratory department found new information on the corpse.

Walking quickly into the laboratory department, Wen Qiaoqiao was sitting in front of the computer sorting out the data, she raised her eyelids slightly and smiled at Lu Ke.

"I heard you caught the suspect?" Wen Qiaoqiao was still sorting out the information and asked in a low voice.

Lu Ke was having a headache about this matter, then sighed and said lightly: "Caught, but it's just a thief, it has nothing to do with the murder, and it has been handed over to the Public Security Division." ”

After hearing this, Wen Qiaoqiao smiled, and said in a mocking tone: "There is also a case that can make Captain Lu sigh, it is really not simple." ”

Lu Ke was very helpless, and didn't think about Wen Qiaoqiao's words, but just said casually: "Maybe our thinking is wrong......"

Wen Qiaoqiao looked at him and kept laughing.

Lu Ke settled down and asked her seriously: "You called me just now, saying that there is a test report or a pathological test report, what is the situation?" ”

Wen Qiaoqiao looked at him lightly and quipped: "I'm going to show you a few reports to change your mind." Maybe as soon as you change your mind, the clue will come? ”

Hearing this, Lu Ke faintly felt that something was wrong, and judging from Wen Qiaoqiao's expression and words, it was obvious that he had made a major discovery.

Thinking of this, Lu Ke instantly cheered up and asked her seriously: "Is there anything found in the inspection report?" ”

Wen Qiaoqiao nodded, his eyes fell on the computer screen again, and his hands were tapping on the keyboard: "Section Chief Guan has gone to the laboratory, and he will be back in a while, and he will tell you the details." ”

Lu Ke spent a long three minutes in the laboratory department, and Guan Hanlin, the head of the laboratory department, finally pushed the door and walked in.

"Team Lu, you're here."

Guan Hanlin's footsteps were very anxious, and he simply said hello to Lu Ke.

Lu Ke nodded politely and asked him directly, "Did the pathology report find anything?" ”

Guan Hanlin nodded vigorously, opened the report in his hand, handed it to Lu Ke, and said: "We found a trace amount of secretion on the deceased's socks, and after examination, it was found that it was a tissue fluid that exuded after the cells of the dermis were damaged, and there was an active fungus. ”

He pointed to a line on the report and said seriously: "We used a petri dish to culture the fungus, because the time is too short, more information is not available for the time being." However, it has been determined that it is Trichophyton rubrum. ”

"Trichophyton rubrum?!"

Lu Ke looked at Guan Hanlin in a daze, he felt a little puzzled and puzzled by this kind of professional term.

Guan continued: "Trichophyton rubrum is a species of Trichophyton genus, which is a human-derived dermatophyte fungus that is contagious and can cause common superficial skin mycoses, such as tinea manufolia, tinea pedis, tinea capitis, etc. ”

Lu Ke only understood a rough idea, and asked Youyou: "This was extracted from the deceased's socks, so the deceased should have suffered from tinea pedis...... Wait a minute, isn't athlete's foot just athlete's foot? ”

Guan Hanlin smiled faintly and explained: "Tinea foot is indeed what we often call athlete's foot, which is specifically a fungal infection, and Trichophyton rubrum is one of the fungi that causes athlete's foot. However, if tissue fluid can be found on the socks, it means that the deceased's feet must have developed herpes due to fungal infection, and those tissue fluid secretions are oozing after the herpes is broken. ”

Lu Ke thought carefully for a while, and suddenly felt that something was wrong: "But in the process of autopsy, we didn't find that the deceased had herpes on his feet......"

When Guan Hanlin heard this, he suddenly became serious, and he said to Lu Ke seriously: "The problem is here, we also tested the biological samples of the deceased, and found that the deceased was not infected with Trichophyton rubrum, so the tissue fluid secretion on the socks is ......."

Lu Ke suddenly came back to his senses and answered: "It was left by the murderer!" ”

Guan Hanlin nodded, and followed Lu Ke's words to give his own analysis: "The murderer must have touched the deceased's socks with the part infected with Trichophyton rubrum and herpes, so he left tissue fluid secretions. ”

Although Lu Ke understood Guan Hanlin's analysis, he still felt a little incredible.

He raised his head, stared at Guan Hanlin for a while, and suddenly asked, "Can a person's mouth be infected with Trichophyton rubrum?" ”

"Mouth?" Guan Hanlin was stunned.

Lu Ke's expression was still very firm, and he continued to ask: "According to the autopsy, we found that the murderer had a considerable degree of foot fetish, and in the process of committing the crime, he bit the deceased's foot. ”

Guan Hanlin understood Lu Ke's thoughts, but the question seemed to be beyond his knowledge: "Normally, the salivary amylase and gastric acid in the human mouth have a bactericidal effect, and the environment in the oral cavity is not suitable for fungal growth. However, if the patient's immunity is low, the oral cavity is abnormal, and the sterilization environment is destroyed, there is indeed a risk of infection. It's just that I haven't encountered this situation yet. ”

Wen Qiaoqiao, who was on the side, suddenly snorted, pouted and said: "Because of my foot fetish, I got athlete's foot in my mouth, tsk, it's terrible." ”

Wen Qiaoqiao is not wrong, the murderer has a considerable degree of foot fetish complex, this is definitely not his first case, but no human life was involved before, so there is no relevant case record.

The foot fetish complex is a psychological disease, and it is a long-term process, and the murderer must have been in contact with the foot with athlete's foot before this crime, so he contracted this condition.

In the office of the criminal police team, in response to this recent clue, Lu Ke reformulated the direction of the investigation.

"The murderer's mouth was infected with Trichophyton rubrum, that is, athlete's foot, and contacted the Health Bureau and the Food and Drug Administration, focusing on inquiring about the prescription drugs for the treatment of beriberi in the city. In addition, all hospitals and clinics in Jing'an City were surveyed to see if there had been any similar cases. ”

After Lu Ke finished speaking, he smiled faintly: "I got athlete's foot in my mouth, if any doctor has treated this kind of case, he will never forget it for the rest of his life." ”