To join at 17 you have to have a parent sign for you. If you have a police record and medical problems that you failed to disclose at MEPS, then you certainly will get out of the Army, only after you have been court martialed and have spend up to three years in prison and fined $10,000.00.
Lying to Get Into the Military is a Felony
Let's get straight to the point. Knowingly giving false information or withholding required information on any recruiting form is a criminal offense (When the information would have made an individual ineligible to enlist, or would have required a waiver to enlist). It's not a misdemenor, it's not the same as getting a speeding ticket. It's a felony offense, punishable by a $10,000 fine and three years in prison. If you lie to get into the military, you are committing a felony. It's that simple. If you get away with it long enough to actually enlist, and are caught later, it's also a "military offense." You can be prosecuted for a violation of Article 83 of the Uniform Code of Military Justice (UCMJ), which states:
"Any person who--
(1) procures his own enlistment or appointment in the armed forces by knowingly false representation or deliberate concealment as to his qualifications for that enlistment or appointment and receives pay or allowances thereunder; or
(2) procures his own separation from the armed forces by knowingly false representation or deliberate concealment as to his eligibility for that separation; shall be punished as a court-martial may direct."