Xu Jingnan brought back to the laboratory the insect larvae found from the explosion of Mine No. 3, and after examination, he was surprised to find that the larvae were none other than butterflies. In other words, the butterfly really appeared at the scene of the explosion and died in the explosion, but the larvae laid by the butterfly escaped the catastrophe because of their small size and existence in the cracks of the stones, and the scale of the explosion was not particularly large, so they escaped the catastrophe and became survivors of the gas explosion.

This conclusion alone has been able to prove that there were indeed butterflies in the mine where the explosion occurred. As for whether it was because of the so-called butterfly elves, which caused the explosion, Xu Jingnan couldn't decide, but he soon made a more significant discovery.

In the abandoned No. 2 mine, Xu Jingnan caught a grimace butterfly that was still active, and after several days and nights of hard work, he finally determined that this so-called butterfly spirit did not actually become an immortal or a Buddha, but an ordinary butterfly, but a mutation.

After investigating the chemical composition of the remaining at the scene, Xu Jingnan has determined that the butterflies were poisoned because the butterflies that had been closed in the mine for a long time and did not see sunlight, causing their growth deformities, and their faces were distorted, which looked very scary. Moreover, their wings have also been devastated, severely corroded and destroyed, so in most cases, they cannot fly.

Linked to the larvae in Mine No. 3, Xu Jingnan boldly speculated that these were the appearance of the Grimace Butterfly when it was first born. At first, everything was normal, but after the explosion, the larvae were under for a long time and turned into the terrifying butterfly elves of Mine 2. These cocooned butterflies, with terrified grimaces and strange behaviors, speak of their calamities and the untold suffering of the miners working underground.

After the mutation, the butterflies have sharper teeth, huge mood swings, moodiness, have lost their original soft nature, become manic, and become bloodthirsty. Therefore, they also like to bite people bizarrely, including animals that have no intention of stepping into it. And because they contain toxins in their bodies, after biting, they will make people hallucinate, and after comparison, the poison in the butterfly's body is indeed the same as the composition of ether.

Although these butterflies are mutated, their teeth are still very short, and their bites are no different from mosquito bites, so in past autopsies, forensic doctors have treated the small wounds on the corpses as ordinary mosquito bites, so they have not paid enough attention. After comparing again, it was finally determined that the subtle wounds on Cao Bao and Wang Mazi's bodies, as well as the butterfly's tooth bite, were all the same, and it is certain that they were bitten by the grimace butterfly before they died, resulting in hallucinations.

For the sake of insurance, Xu Jingnan re-sampled the blood of Wang Mazi and Cao Bao for laboratory comparison, and after many uninterrupted examinations, it was finally determined that the hallucinogens in them came from the mutated butterfly.

This is already the case, and the secret of the ghost-faced butterfly bite has been revealed, and they are mutated to produce toxins that attack those who enter the mine, causing the victim to hallucinate. Therefore, no one poisoned the victims from beginning to end, and the source of the hallucinogens in the bodies of the eight deceased was butterflies, and the case seems to have turned into an accident.

Chen Tianyu finished reading Xu Jingnan's inspection report and was silent, he had a lot of things that he needed to slowly recall in his mind, which was also his own style. He felt that although the ether in Wang Mazi and Cao Bao's bodies was not artificial, but was bitten by a butterfly, this did not rule out the suspicion that the two were murdered.

First of all, even though the Grimace Butterfly looks terrifying, it is not aggressive, it will not directly cause death, and it will not even hurt people. It's just that because of the mutation, which makes it look too scary, and the legend of the butterfly elves in the mine for many years, it gives people this illusion, saying that they will die soon when they see butterflies. Grimace butterfly bites, but also only produces mosquito bites-like wounds, this kind of trauma for the human body, is insignificant, no one because of mosquito bite a few bags to die, of course, except for the infection of germs, that is also a complication.

Second, the toxins contained in the Grimace butterfly have been shown to be hallucinogens, which can cause hallucinations, drowsiness, or drunkenness, but not fatality. At most, it will only make the bitten person faint, but if there is no other problem, it will naturally wake up. According to the narration of Wang Mazi's wife Wang Ruyun, as well as the confirmation of the surveillance video in the hotel where Cao Bao stayed, it can be shown that the two of them did have insanity and swaying walking some time before they died, which shows that the venom of the butterfly has brought them a more serious impact. However, the effects are confusing, but never catastrophic, as the lab's conclusions confirm.

Again, and the most critical point, the cause of Wang Mazi's death is undoubtedly that he was hit in the head by a stone, resulting in intracranial hemorrhage and died. This is definitely not the effect of hallucinogens, no matter how confused Wang Mazi is, there is no way to climb to the top of the mine and personally take down a stone and hit his own brain. Again, it wouldn't be so coincidental that he could spot a rock about to fall and wait there, which was unimaginable. Regardless of whether Wang Mazi was smashed by himself, an accident, or someone else's hand, it would not be the result of the grimace butterfly and the hallucinogens in his body.

This is especially true for Cao Bao, who died at a very high concentration of alcohol in his blood, which reached the standard of drunkenness, and the cause of death was myocardial infarction. Hallucinogens only make him walk unsteadily and look weird, but they do not increase the concentration of alcohol, which he naturally drank from alcohol. However, Yan Baoping is very sure that her son can't drink and can't drink, because Cao Bao is allergic to alcohol, so he is very peculiar in this matter. Why did Cao Bao drink so much when he knew that he couldn't drink, and was it out of his own volition?

Therefore, Chen Tianyu believes that the deaths of Wang Mazi and Cao Bao are not simple, even if they are poisoned by the ghost-faced butterfly, they cannot rule out the suspicion of murder. Of course, Xu Jingnan's test is very useful, at least it can determine the role of the ghost-faced butterfly in the coal mine explosion case and the death of Wang Mazi and Cao Bao, and the truth of the butterfly elves that have been circulating in the mine for many years seems to be about to come out.