How come a convicted sex offender was able to enlist and ?

How come a convicted sex offender was able to enlist and someone without a college education, no legal trouble not even a speeding ticket and no medical problem having trouble enlisting just because he has tattoos (non offensive) on his wrists and arms? Something is not right here.
Update: His tattoos says wisdom, strength and hope and around all of it is this design. don't think anyone find those words offensive. he is 21 so not past any age limit and his height/weight is within regulations. The recruiter said that aside from the tattoos nothing else DQs him. dont know details about the crime... show more His tattoos says wisdom, strength and hope and around all of it is this design. don't think anyone find those words offensive. he is 21 so not past any age limit and his height/weight is within regulations. The recruiter said that aside from the tattoos nothing else DQs him.

dont know details about the crime the sex offender had but he did spend time in prison for it. He is getting ready to go to basic training for the army.
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