This unit investigates forgeries, credit card abuse, ID theft and other related crimes. Learn about other duties of this department.Forgery Office Hours: 8am-5pm (Mon-Fri). Criminal Investigation Division. The purpose of this packet is to provide the information necessary to pursue criminal charges for forgery related offenses. The San Antonio Police Department Forgery Unit is the follow-up unit for Identity Theft. Account Name on Check: Number: 2.