with his then 17-year-old girlfriend, michelle carter. she stays on the phone with him to ensure that he s dead. reporter: those text messages are the subject of a criminal case against michelle. prosecutors claim she not only pressured roy into killing himself, but helped him plan suicide. according to court documents, the two spoke about roy killing himself for weeks, with carter texting him, quote, you re finally going to be happy in heaven, no more pain, no more bad thoughts and worries, you ll be free. when the 18-year-old voiced concerns about house hi parents would feel, carter wrote, quote i think your parents no you re in a really bad place. i think they will understand and accept it, as roy considered his options, carter suggested use carbon monoxide sending, quote if you admit 3200 ppm for five or ten minutes, you will die within a half hour. prosecutors also allege that