Michelle Carter is a teenager from Massachusetts charged with taunting her boyfriend to commit suicide could go on trial for manslaughter. Prosecutors say Michelle Carter used her cell phone as a tool to make her 18-year-old boyfriend take his own life by encouraging him in dozens of text messages. Conrad Roy died of carbon monoxide poisoning in July 2014 after locking himself inside his truck in a K-Mart parking lot. Days before the suicide, prosecutors say Carter wrote, 'Don't be scared. You're finally to be happy in Heaven.' Prosecutors are attempting to criminalize Carter's free speech in the case when there is no law against encouraging or assisting suicide in Massachusetts. Thirty-nine states have such laws.