It is very probable.
No. And if he ever enters the country again he can be arrested for "agrivated re-entry" which is another felony and he will spend 1 to 10 years in a Federal prison. He will never be welcome in this country once he commits a felony here.
Obviously, you are responsible until he returns (if ever) from Mexico.
Yes, have you ever traveled on the Mexican train system?
Sorry, a felony remains on your record forever and ever.
i have a felony can i ever work in a hospital
No it is not a felony. But if they do a back ground check they will see the felony and question you about it.
no Kesha never traveled to Saudi Arabia.
No.
no but it would b nice
Nobody has ever done that yet.
if there are no other cases, then NO
No. A felony from any state remains on your record for life.