Monday, Deputies Carter led out of Taunton, Massachusetts, the courtroom after Moniz had given Commonwealth's request to revoke the stay of his sentence.
The case raised speeches about whether a person should be held accountable through their words for the actions of others.
"The Roy family is happy to have this aspect of the case," says family lawyer Eric S. Goldman in a statement. The family continues to claim damages and hopes to create a fund in their son's name to educate people on suicide prevention.
Carter was 17, when Roy, 18, died in July 2014. The case hinged on text messages between the two, where Carter urged Roy to kill himself.
Prosecutors claimed that Carter listened over the phone when Roy choked inhalation of carbon monoxide in his pickup truck and failed to inform his parents or authorities when he died.
Carter's lawyers argued that her words encourage Roy's suicide, "but scary to this right was protected speech."
"Massachusetts would be the only state to maintain an involuntary violence conviction where an absentee defendant, in words alone, urged another person to commit suicide, "the lawyers said in their move.
Carter's lawyer said earlier this month that the ruling adherence to the belief was based on a narrative, the evidence did not emphasize.
"Today's decision stretches the law to blame for a tragedy that was not a crime, disturbing consequences, for freedom of speech, due process and the exercise of judgments that should concern us all," said lawyer Daniel Marx.
CNN's Janet DiGiacomo and Carma Hassan contributed to this story.