In Illinois, even if you have NO criminal background, the minimum sentence for a gun case is one year in the penitentiary; YOU ARE NOT ELIGIBLE FOR PROBATION! Also, if you are already a convicted felon, you are not allowed to have a gun even in your house.
Penalties for gun possession increase depending on your criminal background. If you are charged as an ARMED HABITUAL CRIMINAL, the minimum is 6 years at 85%. As you can see below, we win most of these cases by showing that the police search was unconstitutional.