Los Angeles ? A judge has finalized his decision to throw out convictions of a Missouri mother for her role in an Internet hoax directed at a 13-year-old neighbor girl who committed suicide.

U.S. District Judge George Wu said in his written ruling that the case was never a legal test of crimes involving “cyberbullying.”

Prosecutors, who adopted that terminology early on, brought charges against Lori Drew under the Federal Computer Fraud and Abuse Statute which does not involve cyberbullying, the judge said.

Wu acquitted Drew of misdemeanor counts of accessing computers without authorization last month but stressed the ruling was tentative until he issued it in writing.

Drew’s attorney, Dean Steward, believes Wu’s ruling in effect strikes down a portion of the computer fraud act.

Prosecutors say Drew sought to humiliate Megan Meier by helping create a fictitious teen boy on the MySpace social networking site and sending flirtatious messages to the girl in his name.

The fake boy then dumped Megan in a message saying the world would be better without her. Megan hanged herself a short time later, in October 2006, in the St. Louis suburb of Dardenne Prairie, Mo.

Drew was not directly charged with causing Megan’s death. Instead, prosecutors indicted her under the computer fraud act, which in the past has been used in hacking and trademark theft cases.