SOLUTION:

The driver of the Chevrolet is not Mr. Miller(clue 1)or Mr. Allen(clue 4), so he is Mr Bailey. He does not live in the blue house(clue 1) or the green house(clue 4), so he lives in the red house.

Since the driver of the Dodge (the bank robber in clue 3) does not live in the blue house(clue 3) he lives in the green house, and by illimination, the driver of the Ford lives in the blue house.

Since the driver of the Ford lives in the blue house, he is not Mr. Miller(clue 1), so he is Mr. Allen, and the driver of the Dodge is Mr. Miller. Since Mr. Miller owns the Dodge, he is the bank robber.

Dear Jack,

I just saw that you posted the solution as I was making my post. Having now seen the answer, I'll be able to sleep more peacefully tonight!

Sincerely,
Rush

Got it!

Any more puzzles like this? I love logic problems!

Dear Jack,

You have come up with a toughie! I will see if I can try to come up with an answer tomorrow morning when I have a little time and a clearer brain...that is, unless we already have the answer by then!

Sincerely,
Rush

Without looking at the solution (I'll post again after I see if I'm right...)

The robber is Mr. Miller!

Suspect	House	Car
Miller	Green	Dodge
Allen	Blue	Ford
?	Red	Chevrolet

? = Unnamed third suspect.

Now, let's see how I did...