On July 20, 2014, 18-year-old Conrad Roy killed himself by carbon monoxide poisoning. He had a long history of mental health issues; he had attempted suicide prior to his final attempt. Prior to succumbing to a loss of oxygen, he got scared and left the truck. However, he had been texting his girlfriend, Michelle Carter, throughout the process. After telling Carter that he was scared, Carter told him, "get back in."