You need to find a lawyer who is familiar with firearms law to get a correct answer.
Convicted felon.
Not legally. It's illegal for a felon to own a gun in any state.
There may be a couple of small exceptions, but the answer is no.
can a convicted felon's wife own a firearm that is not in his home
You need to consult a lawyer
Yes. An air rifle is not considered a firearm, thus a felons possession is not limited.
Federal law (18 US Code 922) says that a convicted felon- ANY felony- may not possess a firearm. In any state.
Yes, in some cases a convicted felon can own a crossbow in the state of Washington. The felon will need to have permission from his parole officer.
No
no
Illegally
No.