- Mr. Gem, you are arrested

Gem is escorted by the police in his neighbor's surprised look. Because no one knows or believes that he is a dangerous criminal, no one imagines he will be in charge for murder. Gem, in their eyes is a silent and nice man. However, behind his mask is a mind of cold-blood killer. Some murders acted for retaliation or for unintentional situation. Differing from them, Gem killed his opponents (as he considered) for experiments to get good examples for his handbook. This handbook was named Handbook of Killing. From the childhood, Gem usually dreamed of being popular. It seems a good thing because anyone has a wish and purpose to be a motive of efforts. Nonetheless, Gem chose to make an odd thing. He want to be a popular killer as Zodiac killer or Jack the Ripper who murder without any compensation for their crimes and cannot be arrested. Gem made his version that he writes a book to teach others how to kill someone else without being in charge. He would be a star, be popular in the eyes of those admire him and his reputation may be as much as Zodiac killer. So said, so done, Gem started to plan methods of killing and who would be his victims. He turned on his laptop and typed a first page of the book:

"#1 Poison. Poison is the easiest way to kill someone whom you hate. You do not need gloves or clean blood after killing as you use knife. You can easy to lure your prey in somewhere or even your house and offer them some poisonous food or drink. And then, they will disappear. However, you should choose an undetected poison. Please learn how to use deep web and buy that. There are many items in here. Let me show you an example"

He uses Tor after that to access the new Silk Road which was called New Pat. He searched for a poison that he had seen yesterday:

- Ah! Here, "Nice Sleep"!

Nice Sleep was advertised that could kill someone else by a heart attack with 10 mg. It, of course, was undetectable. It would be installed and operated in a victim's blood vessel slowly. After three days, as needle stab into a heart, the victim would die fast that no medical emergency can save his or her life. Gem spent $100 to buy and found someone for the experiment. He suddenly thought about Mark – a chef who was his brother's friend. He had no enmity with Gem, but, Gem hated him due to his job. Gem used him as a test for his killing method. Immediately, Gem took his phone and call Mark:

- Hi Mark, are you free tonight?

- Yes, but why?

- I am trying to make some nachos and call you to come and check my cooking progress

- It is alright! I will come and also enjoy our dinner

- Oh good! See you!

After a phone call, Gem came to the kitchen, made some nachos as he had said to Mark and did not forget to add a little Nice Sleep in. Also, knowing that Mark love wine, he put all of the rest of that poison into a bottle of Bordeaux wine.

As promising, Mark came to Gem's home

- Come in, Mark. I give you a special thing

Gem brought a bottle of Bordeaux wine and offered Mark a glass of it. Because there was poison in wine, Gem plead to go to bathroom and took an antidote as an instruction of the seller (Gem had bought a combo of poison and antidote) that used before the poison meal. Then, he came out the dining room with a pot of nachos and split into two dishes for him and for Mark. Mark enjoy the meal with no doubt and did not know he was eating and drinking a poison. He just thought Gem was so kind to him. Finishing the dinner, Mark thanked to Gem profusely and complimented Gem to rise one level of cooking. But, Gem, he waited for a "good result" impatiently. Three days! It seems a long time.

As he wished, Mark die after that dinner three days. And Gem was hurry to attend at Mark's funeral not for his regret of Mark's death, for a picture instead. He need to take a photo in order to add in his book while he still presented a sadness at the funeral. Gem also pasted a photo of poison and New Pat link of buying Nice Sleep.

Now, the first chapter of this book was completed. He turned to write a new chapter. The second method was "dog". As he had watched a move that the killer used dog to kill his teacher by pouring one drop of stimulus liquid to victim's clothes to make the dog in the street attack him to die when smelling that liquid. Although the killer was arrested in movie, in reality, no one can detect why a victim was bite to die by the dog. Therefore, Gem continued to search in New Pat for this drug. Finally, he succeeded. He found a liquid to make a dog attack someone else with unexplained reason. $120 for it and he received the "tool" after two weeks. Tony would be the next example. Tony was a friend of Gem from university. However, he was an "early bird" to get a heart of Gem's crush. Therefore, Gem always considered Tony as his enemy. And no one knew that because Gem did not let someone know. Gem ought to put Tony on the first chapter. Nevertheless, he want Tony get a painful and bloodshed death. So, he let Tony be the second method's example. And he learned that when he invited his crush for a coffee, Tony would come along with her. Therefore, he called his crush:

- Hey! Coffee?

- Great!

- Also, I have some interested games and tactics to show Tony. Are he next to you? If yes! Talk to him. Ok?

- Yes. Of course! That's my best friend.

It was hard for Gem to drop that liquid to Tony's coat. However, he should distract them, invited them for a coffee and asked them to come to his home. Then, he offered them more cake and water. Tony may need to go to bathroom and Gem would have a chance to drop a liquid into Tony's coat in case he put his jacket outside, or Gem should be desperate poured liquid in his hands and find the way to touch in a jacket of Tony. After considering, he decided to lure them in his house and poured a liquid in his hand in bathroom, then, touch Tony's jacket. As promising them, Gem came to a café. During their conversation, he constantly mentioned about new games in his PS4 and laptop, which excited Tony. So, he accepted the invitation of Gem. Of course, his girlfriend came along with because they was a couple, cannot without the other. As a plan, Gem let they come to his house and with the same reason like the day when Mark came, he must use a bathroom. But, he poured a liquid in his hands actually. When he went out, he pretended to show Tony his games in the bed room by touching Tony's shoulder in a wink. Like Mark, Tony also felt happy after joining in Gem's day, but did not know the Death was waiting for them in the next few hours or the next few days. Contrast with Mark when he had three last days to live, Tony die faster in few hours after leaving Gem's house. In this evening, when he went out to buy some food, he was killed suddenly by a Pit Bull. This was an aggressive dog and never stop biting a victim unless its owner's command. In some cases, this dog keeps biting without obedience and Tony was so unlucky to be in this case. The Pit Bull constantly bite him and he die because of a bite mark in his neck. Now, Gem was a happiest one though his crush would be in misery. He also got a golden opportunity to be closer to her. Watching a news of Tony's death on Facebook, he celebrated not only for his successful experiment, but also for his material in chapter 2 of his book. Gem's mind now was as if fulfilled by the devil. He killed his enemy without any fear or horror. He did regardless of losing his conscience completely. His heart became colder than the snow ice. He would not stop the killing unless his book was finished.