The police soon arrived at the scene, Officer Twilight, Officer Takagi, Officer Sato, Officer Shiratori...... It's all familiar faces.

Cordon off the scene, collect physical evidence, and interview witnesses...... A complete set of complicated criminal investigation processes, in the hands of these capable policemen, are naturally familiar with it.

"So that means that this Sister Gloria was subdued by you when she was trying to commit murder, and then she died suddenly for some unknown reason, right?"

Officer Takagi questioned the three nuns, Aika, Ronin, and Teresa.

I whispered to Conan what the strange drugs were that could cause heart disease.

"Digitalis. Conan said in a deep voice: "Gray Yuan told me that considering the concealment, the speed of effect, and the ease of getting started, the most suitable medicine is digitalis. ”

"Is it a Chinese medicine?"

"Well, it's a prescription drug that can effectively treat heart failure, and it's available in both big hospitals and larger pharmacies. Conan nodded.

"If you overdo it...... I seem to understand where the toxicity of this drug is.

"Once taken in excess, it can cause a slow pulse, delay the contraction of the heart, increase the return of blood, and cause the ventricles to need less oxygen, which will lead to angina pectoris and myocardial infarction. Conan said with a solemn expression.

"I see. I nodded knowingly, and then looked at where Sister Jeska had fallen.

"If nothing else, Sister Gloria's death was Mother Jeska's handiwork, right?"

"That's right. Conan nodded in agreement.

"It should be effortless to just hide a little powder in your cuff and add a little to Sister Gloria's black tea while your back is facing us. I muttered as I reflected on Sister Jeska's movements.

"That's right. ”

"So ......"

At this point, Conan and I looked at each other and said in unison, "Just check the residue on Sister Jeska's clothes and you can find evidence." ”

"It's a pity, two kids. ”

Just as I was talking to Conan, a voice suddenly interjected.

Aki Tsukishima squatted in front of me and Conan and said with a smile, "Heart failure is Sister Jeska's old problem, so she has always had the habit of taking digitalis to cure diseases, so even if the ingredients of digitalis are detected from her body, it doesn't mean anything." ”

"No, that just means that Sister Jeska is a prisoner. Conan shook his head.

"Oh, why?" Aki Tsukishima was slightly surprised.

"It's simple. Conan smiled confidently and gave a thumbs up to Aki Tsukishima: "First, Sister Jeska is the only person present who can legally hold digitalis. ”

"Second," Conan continued to hold out his index finger, "Sister Jeska had a motive to kill. ”

"Third, and most importantly," Conan stretched out his middle finger, "Sister Jeska was the last person to come into contact with Gloria, and, judging from the speed of Gloria's reaction, the concentration of digitalis is probably quite high, as long as you detect the concentration of digitalis in the cup in which Gloria drank black tea, you can completely determine that the real murderer." ”

"Maybe someone else put a large amount of digitalis in Gloria's cup to blame Sister Jeska?"

"No," Conan shook his head firmly, his brow furrowed slightly, "Don't forget, Sister Jeska herself took a sip of the tea before feeding it to Gloria. ”

"Ah, well, I forgot that. Aki Tsukishima couldn't help but cover his mouth slightly.

"Well, the facts are pretty clear, the only problem is ......" I nodded, looking at Conan.

Conan replied with a slight bow.

"What, don't you play dumb riddles, and tell me about it, okay?" Aki Tsukishima looked at Conan and me with interest, his eyes going back and forth between us.

"It is the determination of the cause of death. Conan said in a deep voice.

"Can this drug be detected from residual blood?" I asked softly.

"No, you can't. Conan shook his head: "The symptoms caused by this medicine are exactly the same as heart disease, and it is impossible to find the drug residues in the blood vessels and the degree of damage to the heart without dissection, Agatha, the queen of British mystery novels, once wrote about it in her novel "Death Date". ”

"Wouldn't that be a long wait?"

"Well, there's no way around it. Conan frowned with a headache as well.

"But it doesn't matter, even if you wait a little longer, the prisoner will still end up on Sister Jeska. The key question is ......"

Speaking of which, I can't help but have a headache either.

"Yes, the key issue is that Sister Jeskar is also dead. "Aki Tsukishima gloated and made up for me and Conan.

"If Gloria's death was due to an overdose of digitalis, then, among all the people present, there was none other person who knew digitalis best than Sister Jeskar herself, so why did she, like Gloria, die of a heart attack?

"I don't think so. "After thinking about it for a moment, I denied Conan's idea.

In the circumstances, if Sister Jeskar decided to kill Gloria with digitalis, then she would definitely be extra careful with the use of digitalis, how could she die because of the same means?

Besides, whether it is breakfast or black tea, she uses it with us, and she has never eaten anything alone at all, so how can she have the chance of overdose of digitalis?

Was it really an accidental heart attack?

Don't be funny, how can there be such a stupid coincidence.

"Hey, do you feel like it's a little hot in this room?" I thought about it all the time, and I felt like I was running a machine at full strength, and my whole body was hot.

"No, I think it's pretty cool. Conan was still thinking about the problem in the case, and he didn't notice it at all, and he began to sweat slightly.

"Will it ...... Is it that there is digitalis in the teapot itself?" Aki Tsukishima suddenly said in a voice.

"What?" Conan and I were startled at the same time.

"Well, I also have some understanding of digitalis by chance. "In the face of Conan's direct gaze at me and Conan at the same time, Aki Tsukishima turned his eyes a little uncomfortably and did not look at us.

"I've heard that this medicine is very easy to accumulate and poison, and under normal circumstances, each time you take it, you have to wait a long time before you can take it a second time. So ......"

"So if you continue to add less to your diet, Sister Jeskar will be poisoned without knowing it. "Following Aki Tsukishima's words, Conan and I spoke at the same time.

"That's right. Aki Tsukishima nodded and said, "And you may not know that the black tea that I just brewed is Sister Yeska's favorite Ceylon Timbra black tea, and she rarely takes it out for others to drink." ”

"Are you trying to say that someone secretly continued to poison Sister Yeska's black tea, and then just now, Sister Yeskar's body reached a critical point?"

Conan stood there, his fingers rubbing his chin incessantly.

"But this tipping point was just reached?" I looked at Aki Tsukishima suspiciously.

My gut tells me that it's probably not that simple.

"Could it be that there is something wrong with the pot? I heard that in China there is something called a 'yin-yang pot', which has a mechanism in it that can make half of the stuff poisonous and half of the stuff not poisonous. As I spoke, I looked at the silver teapot that had been put away by the identification class.

"Naa, Officer Sato, maybe there's a mystery in that pot, that's what Uncle Maori said. "Conan has always been faster than me, and as soon as I thought about it, Conan had already run over and told Officer Sato.

"What did Mr. Maori say? ”

Hearing Conan say this, Officer Sato immediately opened the sealed bag and began to check the teapot.

"How's it going? Is there anything interesting in there?" Conan pretended to be a curious baby and poked his head next to Officer Sato.

"What a beautiful teapot. ”

"It's none of my business, it was Sister Tsukishima who asked me to make tea, and the tea was what she said, and I don't know anything. Luo Ning, who was on the side, saw that the police were carefully examining the teapot, and couldn't help but cry out in fear.

"I know!" Aika suddenly spoke, and stretched out her hand to Aki Tsukishima, "She has always wanted to be an official nun in the convent, so in order to please Sister Yeska, she always gives her gifts every once in a while!

"Oh?"

As soon as Luo Ning's words came out, everyone's eyes turned to Aki Tsukishima.

"That's right, I gave the tea to Sister Yeska, so what? that doesn't prove that I poisoned it!" Aki Tsukishima pursed his lips disdainfully.

"Take the leftover tea leaves from the kitchen back to the forensic department for inspection. Officer Twilight turned to Officer Takagi and gave an order.

"I'm sorry, can you come back to the police station with us and assist in the investigation?" Officer Sato stepped forward and said solemnly to Aki Tsukishima.

"Ahh

"Now, why don't you test the remaining black tea ingredients in the teapot first? Maybe it's poisonous?" Conan said to Officer Sato at the side.

"There's poison in the teapot, but haven't you all drunk this black tea before?, are any of you unwell?" Officer Twilight asked as he turned to the crowd.

Everyone, you look at me, I look at you, and they all shook their heads blankly.

"Well, for the sake of insurance, it's better to do a test. Officer Shiratori took notes and said loudly to everyone at the scene, "If anyone is unwell, please let us know immediately." ”

Seeing the crowd arguing, I slowly walked around the scene, recalling the scenes that had happened in my head.

There must be something in this that we missed.

If, as Aki Tsukishima said, Sister Jeska's death was due to the accumulation of toxins in her body to a certain extent, and the key to poisoning was the Ceylon black tea, then, in order not to be noticed, this must be an extremely long process, and the prisoner must have a close relationship with Sister Yeska, and even more so to get in touch with Sister Yeska's personal belongings.

In this way, Aki Tsukishima's suspicion was ruled out.

Because judging from the situation in the kitchen that night, Sister Jeska was extremely wary of Aki Tsukishima, and would never let her get close to her, or to touch her personal belongings.

Aki Tsukishima doesn't seem to make the stupid mistake of directly poisoning the tea leaves he delivers.

And......

"Now, young lady, what are you doing?" I couldn't help but ask, as I paced up to Teresa and saw what the youngest nun had been playing with in her hands.

Everyone was busy with their own business, and Teresa, who seemed to be the youngest and least suspected of committing a crime, was ignored and left to play by herself.

"Turn the rope. Teresa replied simply, still playing to herself.

I took one look at her hair and saw that her double ponytail had somehow turned into a side ponytail.

It turned out that I had untied my headband.

"Looks so funny, can you play with me?" I asked her in a curious tone, pretending to be a child.

“...... Good. Teresa looked up at me, stretched out a pair of white and tender hands in front of me, and showed me the red rope in the middle: "Here." ”

"Thank you, sister!"

I smiled and reached out.

"Ahh ”

The pattern that had just been in Teresa's hand as intricate and delicate as knitting, and as soon as I took it over, Teresa let go, the pattern immediately collapsed and became a bunch of threads that were wound together.

"Stupid. Teresa rolled her eyes at me.

...... This is the first time in my life that I have been judged stupid.

"I'm sorry, sister, can you teach me how to play?"

His fingers were twisted together at the hem of his clothes, his eyes were looking up at forty-five degrees, the corners of his mouth drooped a little, and his eyes were filled with tears. I'm very familiar with this set.

"Good. ”

Teresa turned a blind eye to my superb performance, but fortunately she did not refuse my request, and reached out to remove the headband on the other side of herself, and a black sea of hair poured down from a high place like a clear spring, smooth and supple, black and bright, reflecting her fair little face even whiter as jade, delicate as a doll.

"Do it like this, do it like this...... ...... like this"

Without noticing the change in my expression, Teresa held the red rope in her hand and taught me how to flip around without looking at me, or caring whether I had learned or not, as if she were still playing alone.

"Oh, blah, blah, I didn't see ...... there"

I hurriedly rummaged through the rope in my hand, and I couldn't help but sigh in my heart: no matter how small it is, it is not easy to achieve the extreme.

"Young lady, you are so good, do you usually play alone?" I asked Teresa tentatively.

"Hmm. ”

"Eh, aren't you usually lonely, and don't the other sisters play with you?"

"They...... There's something to do. Theresa hesitated slightly.

There is play. My heart moved.

"That's right...... Does Sister Jeskar usually arrange for you to do a lot of things?"

"She seems to have been talking about prayer or something......

"Well, we usually pray twice a morning and a night, sing hymns, and clean up......"

"That's it, it feels so hard, sister, you're amazing. ”

"Nothing. ”

Although Teresa's expression didn't change, I could still feel that her mood seemed to change a little better.

"Sister Jeska is usually very strict with you, isn't she?"

Hearing my question, Teresa paused, turned her head to look at where Sister Jeska had fallen, and nodded.

“...... Well. ”

It seems that Sister Jeska has a lot of power among these nuns. It felt like I was getting close to my goal, so I continued to be cautious.

"Are you afraid of Sister Jeska, sister?"

“...... Well. After a moment of silence, Teresa nodded slightly.

"Sister Tsukishima doesn't seem to be afraid of Sister Jeska at all. ”

"She's only been here for less than two weeks and doesn't know it yet. Teresa said softly.

It's been less than two weeks......

After a little thought, Teresa's words confirmed my suspicions.

In less than two weeks, if you kill people with poison accumulation, there is not enough time at all.

In other words, long before Aki Tsukishima came here, Sister Jeska had been deliberately poisoned.

The complicated thoughts were racing, but my mouth didn't stop.

"No wonder Sister Gloria was so excited and wanted to ...... This. "Fearing to re-irritate Teresa, I deliberately omitted the word "killing" from my words.

"No," Teresa shook her head at my words.

"Sister Gloria is the closest person to Sister Jeskar in the convent. ”

"Oh?" was a bit of a surprise to me.

"Then why did these two people become like that?"

“...... I do not know. ”

The hesitation on Teresa's face flashed, and it made me think that this little girl probably had some secret buried in her heart.

After chatting with Teresa for a while, I learned more about the monastery, and the thought that Teresa must know something special became more confirmed.

"The results of the examination of the residual black tea in the teapot are out. Conan pulled me aside and whispered in my ear.

"So fast?"

"Well, one of the hardest parts of poison testing is comparing the poison to a sample of a poison of known composition. I told the police about digitalis, and this step was skipped, and the results of the comparison test came out quickly. ”

"Confirm it's digitalis?"

"It's digitalis, and the dose is very small, not enough to poison the average person. Conan nodded heavily: "But ......"

"But what?"

"Through careful examination, the staff of the forensic department also found a little ophidrine under the spout of the teapot. ”

"Snake root?"

"It's reserpine, a very common blood pressure medicine, but ......," Conan waved his phone at me, "Once this medicine is combined with digitalis, it will become a catalyst for digitalis, which is what Gray Yuan told me." ”

"I see. I nodded knowingly: "So, is it the same as the gun that loads a bullet first, and then loads the magazine?"

"That's right!" Finding a breakthrough in the case, Conan's eyes sparkled.

"The prisoner should first apply a small amount of ophinoline to the spout of the teapot, and then when pouring the black tea, the water will wash down the little amount of ophinoline together and mix it in a cup. ”

Sister Jeskar herself has an old problem of heart failure, and this little measure may not be enough for others, but for Sister Jeskar, it is a life-threatening talisman that can be fatal. I continued Conan's words.

"Think about it, who was the first cup of black tea that Sister Ronin poured just now?" Conan stared at me with blazing eyes.

"It's Sister Jeska!" blurted out the answer without thinking at all.

"In this way, the residual ophimenine in the spout of the pot is completely insignificant, and if digitalis is not discovered, no one will notice to test the ophime. I muttered.

Sister Jeska, who was completely unaware of this, secretly put a large amount of digitalis in the cup while her back was facing us, and then poured it into Gloria, so Gloria died of digitalis poisoning, and Sister Jeskar herself died of digitalis poisoning. As Conan spoke, he pushed his glasses, and behind the lenses was a flash of wisdom.

As soon as the train of thought was clear, the ins and outs of the whole incident suddenly became clear in front of me and Conan.

"So, who killed Sister Jeska......" I looked at Conan.

"Just ask Sister Ronin who asked her to pour her tea first. Conan's gaze was like an arrow, shooting at Ronin, who had a panicked expression on his face.