Martin Bashir has an inside look tonight at the tall task of monitoring sex offenders in California and the danger these criminals often pose. The Jaycee Dugard case and sex offender Phillip Garrido thrust the issue into the spotlight in August when she was freed after more than 18 years of alleged captivity at his California home. Now it’s the disappearance of 17-year-old San Diego high school senior Chelsea King, pictured above, and arrest of sex offender John Albert Gardner, who police suspect raped and murdered the teen, that is raising some uncomfortable public safety questions. Here is the top of the latest ABCNews.com story about the Chelsea King case from Russell Goldman and Sarah Netter: Police believe a convicted sex offender arrested in the disappearance of San Diego high school student Chelsea King raped and murdered the girl, prosecutors said today. Arrested on suspicion of first degree murder and forcible rape, John Albert Gardner III, 30, was taken into custody Sunday after police found what they say is physical evidence linking him to King, a 17-year-old high school senior who vanished Feb. 25 while jogging in a park north of San Diego. Police have yet to find King or her body and San Diego County Sheriff Bill Gore said Gardner was not cooperating with the investigation. No bail has been set for Gardner, but he is scheduled to be arraigned Wednesday when he could formally be charged with murder even if King’s body has not been discovered. “There are murder cases that get tried without a body. There is one going on now,” said Paul Levikow, spokesman for the San Diego County District Attorney. Embedded below is Martin’s segment, entitled “How Safe Is Your Child?” Click HERE for more information about the search for Chelsea King.