Move four matchsticks to the below square to form three squares?

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 can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

On rolling two dices (six-sided normal dice) together, what is the probability that the first one comes up with a 2 and the second one comes up with a 5?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

When it's bad luck to meet a black cat?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

Can you identify if it's a murder or a suicide ?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

Can you figure out the logic I used to decide the order of the following words:
gun, shoe, spree, door, hive, kicks, heaven, gate, line, den