An alert citizen helps nab a wanted sex offender.
25-year-old David Strohm was one of Michigan's Most Wanted sex offenders after failing to register his address.
Someone recognized him last week and notified police he was living in Flint.
Strohm was convicted in 2002 of sex charges involving a victim under 13 years old.
Click on the links below to view the Top Ten Most Wanted Sex Offenders, or the Michigan Sex Offender Registry.