The Supreme Court on Monday left in place the conviction of a Massachusetts woman who sent her boyfriend text messages urging him to kill himself. Michelle Carter is serving a 15-month sentence after being convicted of involuntary manslaughter in the 2014 death of her boyfriend, Conrad Roy III. A judge determined that Carter, who was 17, caused the death of the 18-year-old Roy when she ordered him in a phone call to get back in his carbon monoxide-filled truck that he’d parked in a Kmart parking lot. The phone call wasn’t recorded, but the judge relied on a text Carter sent her friend in which she said she told Roy to get back in.