Jurors have begun deliberating whether a Missouri mother conspired with her daughter and an assistant to harass a 13-year-old girl with Internet messages that allegedly prompted the girl’s suicide.

Deliberations began Tuesday, a day after U.S. Attorney Thomas O’Brien told the jury that Lori Drew used a computer to humiliate Megan Meier by inventing a make-believe boy who wooed and then rejected her online.

The defense said the case is a matter of computer law and accused prosecutors of misleading jurors into thinking it was a murder case.

The 49-year-old Drew has pleaded not guilty to conspiracy and accessing computers without authorization. She could be sentenced to as many as 20 years in prison if convicted of all counts.