It's hard to tell which it is from where the rim ends up if it's only a minor misalignment of the wheel. If it was severe enough to make adjusting the brake difficult or cause tyre/fork blace contact I'd definitely be inclined to blame crash damage.

Another thing to check for would be paint rippling, cracking or flaking off somewhere on the fork - paint tends to do that on metal that's been bent, the metal can deform plastically (i.e. bend) but the paint can't, so it cracks.

The string thing dabac suggests will reveal more.

What's the bike?