(Portland, OR)  --  A man who's accused of stalking a Multnomah County deputy prosecutor is behind bars.  Authorities say 53-year-old Shane Vondell Greene is a convicted sex offender who's being held on a parole violation.  Deputy District Attorney Nicole Jergovic told police that Greene followed and harassed her on several occasions after finding out she was a prosecutor.  Greene is also charged with failure to register as a sex offender and possession of methamphetamine.