The Attorney General is the Public Prosecutor for the Territory of Guam, and has designated the Criminal Division to prosecute in the name of the People of Guam all criminal cases. The Division prosecutes adult criminal cases involving felonies, misdemeanors, petty misdemeanors, and certain traffic offenses in the Superior Court of Guam, and certain cases in the U.S. District Court of Guam.
Criminal cases are investigated and referred for prosecution by the Guam Police Department. Other local agencies, including federal law enforcement, may also refer criminal cases. The Division may investigate criminal offenses on its own, including, but not limited to, sophisticated financial white collar crimes and government/public corruption. The Division prosecutes criminal tax cases in the U.S. District Court of Guam, upon referral by the Department of Revenue & Taxation. The Division also represents the People of Guam in criminal appellate cases brought to the Supreme Court of Guam.
 P.L. 32-27 repealed and reenacted the Vehicle Code reducing offenses from petty misdemeanor to civil violations, except for a few violations that remain misdemeanors and under the purview of the OAG for prosecution.