The Colorado Bureau of Investigations (C.B.I.) is looking for five individuals who have been convicted of sexual assault that have failed to register.

These individuals are repeat offenders and in many cases have a history of failing to register as sex offenders, while at least one of them is known as a sexually violent predator.

None of these men are from the Mesa County area, but all are in Colorado and as they have not registered, authorities can only go by their last known address.

Keep your eyes and ears open for these men, do not let them into your home, and if you see them, contact authorities immediately.

Robert Ryan Austin - has used three other aliases, and is a multiple-offender and has not registered.

Lydon Paul Hoover-Has three other aliases is a repeat offender and also has not registered.

Leonard John Lusero A multiple-offender with a history of failing to register.

Brandon Vintonio Martin-Unknown address, failure to register and a multiple-offender.

Miguel Robles-Martinez- A sexually violent predator who has also not registered, as well as being a multiple-offender.

Do not attempt to apprehend these men yourself. Contact the police or sheriff immediately.