The answer is 75 years.
This depends on the state in which you are living in or where the offender held a driving License. A conviction of a DUI in the State of Florida, for example, will remain on your record for 75 years. States like Tennessee retains it for life. However, in the recent past, many states have had shorter periods of time. On top of License conviction, you will incur fines between $500 to $2,000, probation, or serve hours of community service.