A pattern has emerged in California. This problem seems more likely to happen in churches located near prisons where sex offenders are held. Since they are usually in prison several years, the family usually moves to the area. When they are released, they tend to stay in the area. This creates another problem.
Prison systems have strict rules concerning prison guards and their contact with ex-felons.
Therefore, for a ex-felon to even be in the same church as guards could cause the guard to lose his job in some situations.