I shave every day, but my beard stays the same. What am I?

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

There are five people. One of them shot and killed one of the other five.
We know following clues:
1. Dan ran in the NY City Marathon yesterday with one of the innocent men.
2. Mike consider being a farmer before he moved to the city.
3. Jeff is a top notch computer consultant and wants to install Ben new computer next week.
4. The murderer had his leg amputated last month.
5. Ben met Jack for the first time six months ago.
6. Jack has been in seclusion since the crime.
7. Dan used to drink heavily.
8. Ben and Jeff built their last computers together.
9. The murderer is Jack's brother. They grew up together in Seattle.

Consider yourself to be a famous detective "Sherlock Homles", Can you find the killer?

What is the word or phrase?

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

What Adam and Eve do not have but the rest of the people have?

what's the probability of getting a king or a queen from a pack of 52 cards?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?