Read the Law: Md. Code, Criminal Law 3-304. Criminal Charge: Second degree sexual offense (felony). Victim under 14, Defendant four years older than victim. Includes oral and anal sex, see legal definition at Md. Code, Criminal Law 3-301(d).
Potential Sentence: Up to 1 year in prison and fined up to $1,000. 
Criminal Charge: Fourth degree sexual offense (misdemeanor). Victim aged 14-15, Defendant 4 years older than victim, but under 21. 
Potential Sentence: Up to 10 years in prison. Criminal Charge: Third degree sexual offense (felony). Victim aged 14-15, Defendant age 21 or older. Potential Sentence: Up to 20 years in prison. Criminal Charge: Second degree rape (felony). Victim under 14, Defendant 4 or more years older than victim. See legal definition at Md. Code, Criminal Law 3-301(g).