Suicide like Murder Case

I need to examine the first angle in his house. His house at Hu Meng street is owned by a man that was also killed by potassium cyanide poisoning.

I think the killer was killing all the owners of the place but what is his motive. I need to ask officer Ye Fei if anyone visited the owner or had any physical contact.

I went to the police station to contact Officer Ye Fei.

"Officer, do you have any records of people visiting the house of Lu Gei." He looked at my direction and threw me a glance.

"Why do you need it anyway?" He asked.

"You had a case few days ago right?"

"Yes, but it was a suicide case."

"I think it wasn't a suicide. But a murder disguised as murder. I say it because look at different angles."

"Yes, but there's a suicide note."

"But the hand writing, was it same?" He looked at the files and the letter.

"No..." I hit a gold point!

"The case goes on, we just need to match the handwriting to the other suspects." He opened up another file and there listed names of people.

"Here, take this, there listed the names of the visitors of Lu Gei and their address." He passed me the file and it looks like I only have three suspects. They are Hei Zu, Sei Wan and Fu Leng.

What can I do to know their handwriting, wait, maybe if I could make them write their names. Wait, that's it! A survey can do the job but what survey. I need to get to my computer at the apartment.

I rode my bike back at the apartment, to my surprise, Li Chen was playing at my computer.

"What are you doing?" She looked towards me after hearing me.

"Playing League of Legends." She simply said.

"How the hell are you able to..." She cut me off at that point.

"Ximen Feng, trust me, it was hell." I just laughed it off and told her I need to do something.

"Fine, don't touch my League of Legends or else hell will break loose." She stood up the chair and let me sit.

I worked on the survey I was saying earlier and printed three of them. I am a fast typer.

I rode my trusty bike again and traveled to the first house. Hei Zu's house...

His house is surprisingly not to far from where I live. It's like five blocks more.

I knocked on the door and a middle aged man with a black hair came out the house.

"What do you want kid?" He looks like an educated man.

"Sir, I need you to answer our survey if you may," I handed him a survey.

"Okay, let's see, okay, wait here while I sign the survey." He returned back inside while I study the house.

After a few minutes, Hei Zu came out his house and handed me the paper, "See you!" he even threw me a smile.

The farthest house was Sei Wan's so I rode my bike to his house. It took me thirty minutes to arrive that house.

"Hello, anyone there!?" I shouted and an old man with a a cap on his head.

"What is it?" I noticed that the man was a bit grumpy but it shouldn't affect my judgement.

"Will you fill the following information here for our survey," I handed him another paper and he went inside like the first one.

After another few minutes, he handed me the paper after filling out the blank spots.

The last one was Fu Leng's house and it was actually close to Lu Gei's house. After knocking, I did what I did with the two houses.

I waited for Fu Leng until he handed me the paper and went back inside. I need to get a copy of the suicide note to compare it to the penmanship of the killer.

It was almost night and I still went to Officer Ye Fei for the copy. He gave the original copy.

I decided to do the work at my room and god I just saw Li Chen sleeping at my computer desk. I led her to her room and left after.

Gosh, it was too exhausting but I just decided to do it tomorrow, I mean come on, I am just a person so I get tired too.

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I woke up early and as I recorded, it was 5:00 am. I decided to have breakfast and clean myself. Gosh, I thank myself sometimes.

I now work the case. What kind of reward will I get after completing this mission?

I looked and compared the penmanship of the three primary suspects.

At first, it looks like there is no difference between the three of them. Even at my second try. Maybe a coffee will do?

I brewed a coffee while looking at the papers.

I think I know who the suspect is.

His name is...