Three men have been charged in separate cases in federal court in Kansas with failing to register as sex offenders, U.S. Attorney Barry Grissom said today.

Indictments allege each of the men failed to register as required by the federal Sex Offender Registration and Notification Act.

The National Center for Missing and Exploited Children estimates more than 700,000 sex offenders reside in the United States and more than 100,000 are classified as noncompliant or unregistered. More information is available at the National Sex Offender Public Web Site at www.nsopw.gov

Charged in separate cases were:

Billy Joe Lock, 69, Prairie Village, Kan., who was convicted in San Bernandino, Calif., on a charge of lewd and lascivious acts against a child under 14.

Jermaine Smith, 41, Brookfield, Mo., who was convicted in Wyandotte County District Court of attempted aggravated indecent solicitation of a child.

Bobby Moore, 31, Temple Hills, Maryland, who was convicted in Reno County District Court of aggravated indecent solicitation of a child and aggravated indecent liberties.

If convicted, they face a maximum penalty of 10 years in federal prison and a fine up to $250,000. The U.S. Marshals Service investigated. Prosecuting are Assistant U.S. Attorney Kim Martin and Assistant U.S. Attorney Jason Hart.