In January 2009 Webb was arrested at a house in Murietta, California and charged with transporting a minor across state lines for the purpose of sexual activity, a federal crime under the United States White-Slave Traffic Act of 1910 (the "Mann Act").
The incident took place in 2004 with a 15-year-old member of youth groups at Word of Life who was ostensibly traveling as a baby sitter for Webb and his wife, Tara. According to court filings, Webb met the girl when she was 14 and had called her several times a day, later flirting with her and engaging in kissing. During the trip to Oklahoma he entered the hotel room the family had provided to her and attempted to initiate sex, but left when she rebuffed his advances.
He pleaded guilty to the charges in May and was sentenced in July to five years' imprisonment. State charges of second degree rape and second degree sexual abuse were dropped as part of the plea. In August the victim's family filed a civil lawsuit against Webb, his father and the church.
- Gordon, Robert K. (May 6, 2009) "Former pastor of Birmingham church William David Webb pleads guilty to transporting a teenage church member for purpose of sexual activity." Birmingham News
- Gordon, Robert K. (May 7, 2009) "Former Birmingam, Alabama youth minister William David Webb faces sentencing for sexual activity with teen girl." Birmingham News
- Garrison, Greg (July 30, 2009) "Former Word of Life youth minister sentenced after pleading guilty to teen sex." Birmingham News
- Garrison, Greg (August 26, 2009) "Former Birmingham minister David Webb, his father sued by girl he pleaded guilty to seducing." Birmingham News