Charlie Sheen Victim Says Sex Tape Exists And She Can Prove it

[TMZ] The woman who claims 4 of her computers were stolen because the burglars were targeting a Charlie Sheen sex tape has told cops ... she can prove the tape exists because she now has a copy.

Christina Fulton -- Nic Cage's baby mama -- triggered the investigation by reporting the theft, but cops never found the computers or the sex tape.  Nonetheless, Christina's former handyman, Ricardo Orozco, has been arrested and charged with the burglary.  Two other people who were on scene were  cleared by the D.A. because there wasn't enough solid proof to mount a solid case ... something that has pissed off cops.


But now Christina says she has solid proof -- a copy of the tape and she has told cops she will fork it over next week.

The tape could be critical evidence ...As we first reported Orozco and the other 2 went to the office of Charlie's lawyer shortly after the burglary ... asking what they would pay for the tape.  If cops determine the tape did indeed exist and can link it to Christina's computer, it could be a smoking gun in the criminal case.  And it's possible the D.A. could take another look at the other two alleged accomplices.