TAUNTON, Mass. (AP) A Massachusetts woman who sent her suicidal boyfriend a barrage of text messages urging him to kill himself was jailed Monday on an involuntary manslaughter conviction nearly five years after he died in a truck filled with toxic gas.

Michelle Carter was sentenced to 15 months in jail in 2017 for her role in the death of Conrad Roy III, but the judge allowed her to remain free while she appealed in state court. Massachusetts highest court upheld her conviction last week, saying her actions caused Roys death.

A lawyer for Carter had argued the 22-year-old should stay out of jail while her defense team takes her case to the U.S. Supreme Court. Her attorneys said in court documents that she has no prior criminal record, hasnt tried to flee, and has been receiving mental health treatment.

But a judge ruled Monday that she should start her sentence. Earlier in the day, Massachusetts highest court denied an emergency motion filed by her lawyers to keep her out of jail.

Carter showed no discernible emotion as she was taken into custody, though her shoulders sagged as she stood and prepared to be led away.