The QuickChecker

In 2000, a man named John Gardner plead guilty to molesting his 13 year-old-neighbor. His psychiatrist testified that Gardner was "a continued danger to underage girls" and he recommended a 30 year sentence. But, in an effort to protect the victim, Gardner was given just 5 years jail time.

When 17 year-old Chelsea King disappeared outside her San Diego home last week, police say she was abducted and raped by Gardner. He later dumped her body nearby.

Though Gardner was forced to wear a GPS monitoring device until 2008, investigators believe he may have been involved in the disappearance of another teen and a 22 year-old-woman.

Jake Goldenflame spoke out as a convicted sex offender, "It's wishful thinking to believe that simply by locking someone up for a number of years that it's going to magically transform him when he comes out."

It's reminiscent of the Jaycee Dugard case in which, though Phillip Garrido was monitored for heinous sex crimes, Dugard went undetected for 18 years.

John Gardner will spend the rest of his life behind bars if convicted in the Chelsea King case.