A letter

Dear readers,
My name is Katrina Kirby.I'm inspector K and it is my first case, you know.I think you have read about a murder.It's a really strange and mystical murder,isn't it?
I want to write to you about my thoughts and actions.
I have asked five people who was in the house as Mr Gray because I had to know who and why killed Sir Michael.All they had a reason to kill him but only one has done it.
The murderer has made an excellent mechanism where was a sharp icicle, that killed Sir Michael.I found this mechanism in the freezer but I didn't know how it works.The murderer put it there.So I offered to the witnesses whisky and ice.And then I oppened the freezer to take some ice I looked at theirs reactions and actions.I fought that since I can understand who was killed Mr Gray.
After the interrogation I gathered the witnesses together and showed them this strange mechanism.All they were worried.After that we all went to sleep.But I came back to the study because I knew, that the muderer will come after the mechanism.And I was right.Mr Gray's friend came to the study but he wasn't the muderer.He only wanted to look at this mechanism.We were talking then suddenly I heard a noise.I oppened the door and there was the housekeeper.The others came to us, too.I started to ask questions to her.And then she broke down and confessed in the murder.She was the real murderer.
In this my first case was sucessfully completed.The housekeeper put into a prison.
See you in my next case!

Yours inspector K

2.Questions

1.)Why did Sir Michael's friend come to him?
2.)What has K known from his story?
3.)What has K known from the secretary's story?
4.)What do you think, why was the secretary with Mr Gray?
5.)Why did Lady Elizabeth's brother hate Mr Gray?
6.)What for did he come to Gray's house?
7.)What drink did K offer to the witnesses?
8.)Why could Lady Elizabeth be a murderer?
9.)Why could be the housekeeper a murderer?
10.)Why housekeeper didn't want Mr Gray to run away with his secretary?
11.)When did they finish an interrogation?

1.Summary of 20 pages

Two weeks ago I started to read an interesting book "K's First Case".It was written by Loius Alexander.This is a detective story about inspector Katrina Kirby and her first case.
There has been a murder in a big country house in England.One of five people murdered Sir Michael Gray in his study.The study and the window were locked from the inside but someone murdered him.Except Sir Michael in house were his wife Lady Elizabeth, her brother, Sir Michael's secretary, his friend and Gray's family housekeeper.
At 9.30 three of the other people broke down the door to the study and found Mr Gray laying dead on the floor.Then his wife called the police and K arrived with them.
After the police investigation they have known answers to free important questions:Mr Gray didn't die of poison, a murderer killed him with something sharp and he died at 9.25.
K asked some questions to the other people, who was in the house as Mr Gray.She has asked the housekeeper and the wife and has known, that this evening he and his wife were fighting, she doesn't like young secretaries and then they found Sir Michael dead, the secretary was in the garden.