The Logic of Murder – WHO KILLED WHOM?

Logic Puzzle:

There are five people. One of them shot and killed one of the other five last Friday. Which man is the murderer? And who was killed?

1. Dan ran in the NY City marathon on Saturday with his older brother.

2. Mike grew up on a farm and recently moved to the city.

3. Jeff is a computer consultant and plans to install Ben’s new computer next week.

4. Ben met Jack for the first time six months ago.

5. Jack has been in hiding since the crime.

6. The murderer is Jack’s only brother.

7. Jack and his older brother grew up in Los Angeles.