Well, I've heard this riddle before, but here's the intended answer: (stop reading if you don't want to know)
The man is a DJ at a local radio station. His alibi during the time his wife is killed is that his radio show is currently on the air. He turns on the radio in the car and notices that the CD (or record, this riddle has probably been around a while) that he left playing has been skipping. So he knows he will be caught and decides to kill himself.
I think the idea is that you ask "yes/no/doesn't matter"-type questions until you zero in on the answer, though. Of course, if you just present the original statement and nothing else, there could be almost any answer.
Originally posted by Hom25He goes to put his gun in the glove compartment and finds
Man drives up to his house, shoots his wife, gets back into his car, drives a kilometre up the road, then stops the car and shoots himself.
Why? (The question is why did he not just shoot himself in the house?)
his daughters school report card, saying that 'the increasingly volatile
behaviour of her father has led her to a promiscuous life'
Realising his wife was hiding items of mens cloths in her panty draw
to cover her daughters anguish at her increasingly maniacal dad and
not her own guilt, he shoots himself.