Thanks for your question. It saddens me to say it, but the
disappearance of Amy Billig remains unsolved.
There are several articles about "Searching for Amy," a documentary
dated from 1999.
"Screen Watch/In Search of a Lost Cause," by Shane Danielsen. The
Australian, August 5, 1999.
Susan Billig, Amy's mother, who was harassed for years by a caller
claiming to know the whereabouts of Amy, settled a civil lawsuit with
the caller in 1999 against Henry Johnson Blair. Blair was also
sentenced for two years for aggravated stalking.
"Woman Settles Lawsuit with Caller who Claimed Missing Daughter Was
Alive." Associated Press Newswires, January 22, 1999.
Gimarie330, "Suit Settled Against Fla. Harasser." Online Posting,
(January 21, 1999). alt.true-crime
Some cursory information about the criminal trial can be found here:
More information about the case as well as a picture of what Amy
Billig would look like today can be seen at these sites:
Amy Billig/MPCCN Case File: 32F70
Amy's mother, Susan Billig coauthored a book with Greg Aunapu in 2001
called "Without a Trace: The Disappearance of Amy Billig--A Mother's
Search for Justice."
"Without a Trace: The Disappearance of Amy Billig"/Barnes & Noble
Google search (also searched Google Groups
"unsolved mysteries" amy biker
I hope this answers your question. If you have need additional
information or if the links don't work, please ask for clarification
and I'll do my best to assist you.