John Albert Gardner III accused of raping , killing teen who disappeared 17 . Police : Remains found in park 17 believed to be those of the teen , Chelsea King . King , last week , was last seen at school ; her car , with cell phone inside , was found at park . John Albert Gardner III is a registered sex offender , authorities say .
John Albert Gardner III accused of raping , killing teen who disappeared last week . Police : Remains found in park Tuesday believed to be those of the teen , Chelsea King . King , 17 , was last seen at school ; her car , with cell phone inside , was found at park . Gardner is a registered sex offender , authorities say .