What breaks yet never falls, and what falls yet never breaks?

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?

Can you place six X (crosses) in below board without making three in a row in any way ?

What kind of tree can you carry in your hand?

There are forty elephants and they have forty-fore heads. How can this be possible?

What four weights can be used to balance from 1 to 30 pounds?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

A woman shoots her husband.

Then she holds him under water for over 5 minutes.

Finally, she hangs him.

But 5 minutes later they both go out together and enjoy a wonderful dinner together.

How can this be?

The current time can be represented by below textual rebus.

0
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B.Sc
LLB

Can you tell us the current time?

Why is the Hole below a Lock?