The Vanderburgh County Sheriff's Office is looking for Marcus Z. Barber.
Deputies say Barber could also be known as Marcus Z. Milton.
He's wanted for not properly registering as a sex offender.
According to his page on the Indiana Sex Offender Registry, he was convicted of sexual battery in 2008.
Deputies say Barber is 5'05", 180 pounds and in his mid-twenties.