In the U.S. in 2009, the latest data available, there were 558,493 missing persons reported under the age of 18, according to the Federal Bureau of Investigation's National Crime Information Center.

In the U. S. in 2009, the latest data available, there were 558,493 missing persons reported under the age of 18, according to the Federal Bureau of Investigation's National Crime Information Center.

Analyzing computer crime through forensics and anti-forensics, we should find out the origin of anti-forensics to protect national information network security and beat crime.