This is a list of things that could get you a one star wanted level.
- Grand theft auto
- Lightly brushing a cop with your car
- Tripping a cop, accidentaly or otherwise.
- Doing any sort of damage (even a scratch) to a police vehicle. (Wreckless driving)
- Hitting a car too much with your car. (Damage to vehicle)
- Setting ANYTHING on fire. (Burn victims, attack on a vehicle) (even if it's not a vehicle)
- Firearms discharge. (Even shooting the ground)
- Any sort of murder or running over a pedestrian. (assualt)
- Getting on a subway train at the airport. (I think this one's a glitch but it's happened to me twice)
- Pushing a cop too much.
- Self Defense
And of course, the wanted up cheat.
You can also get a 1-star wanted level by hopping on top of a police car. I hate it because you can hop on other cars and not even make the driver mad.