As obvious as this sounds - the best way to learn this information would be to contact a Marine Recruitment Office and ask them. My OPINION is - if that is all it amounts it would not affect your conisderation.
You certainly can. If the record was destroyed because of it being a juvenile conviction, you'd be perfectly fine.
It's not impossible to become a police officer with a juvenile criminal record, but it will be very difficult, especially while you're in your 20s. You will need to show that the juvenile offense was the result of behavior you have abandoned and you have maintained a clean record of good conduct for many years since. This means no arrests, no traffic violations, a good work record, no use of illegal drugs, and meeting all of your financial obligations.
Your juvenile record WILL be available to the background investigator for the department you are interested in, but what that particular department's recruiting/hiring guidelines are, is an impossible question to answer.
Once the juvenile reaches the age of adulthood, their juvenile record should become automatically sealed to the public. I am not aware of any specifc procedures for expunging a juvenile's record while the individual is STILL a juvenile.
Juvenile record, or not, that's a pretty serious charge. You will have to check with your state's licensing agency for this profession to determine if they will issue you a license.
Yes, it is possible to become a police officer with a misdemeanor on your record, but it may depend on the specific circumstances of the offense and the policies of the law enforcement agency.
Therre are procedures for the expunction of juvenile records, but the juvenile record is sealed to the public at the time you become a legal adult in youir state anyway.
If you are referring to your juvenile record it will become sealed and unavailable for public view at the time you become a legal adult.
That depends on what charges are on your juvenile record.
if you have a criminal record can you still join the marines commando
No.
It is extremely unlikely.