The Conrad Roy Case — Texting Suicide Manslaughter Trial

The Case

The Conrad Roy case is a Massachusetts involuntary manslaughter case centered on the 2014 suicide of 18-year-old Conrad Henri Roy III and the unprecedented prosecution of his 17-year-old girlfriend, Michelle Carter, for encouraging him to take his own life. It became one of the most closely watched American criminal cases of the 2010s because it tested whether words alone — sent through text messages, emails and phone calls — could constitute homicide.

The Crime

On July 12, 2014, Conrad Roy III drove to a Kmart parking lot in Fairhaven, Massachusetts. Inside his pickup truck he had set up a gasoline-powered water pump, which he used to fill the cab with carbon monoxide. According to court findings and academic analysis of the evidence, Roy at one point became frightened and stepped out of the vehicle. In a phone call with Michelle Carter, he was told to get back inside. He died of carbon monoxide poisoning in the truck.

Investigators later recovered an extensive digital record of communications between the two teenagers. In the weeks before Roy's death, Carter had sent dozens of messages pressuring him to follow through on his suicide plan, offering methods and reassurance, and chastising him when he hesitated. The prosecution argued that this campaign of encouragement, culminating in the final phone call, amounted to wanton and reckless conduct causing death.

The Victims

Conrad Roy III was an 18-year-old from Mattapoisett, Massachusetts. He had recently graduated from high school, held a captain's license, and worked in his family's marine salvage business. He had a documented history of depression and prior suicide attempts. Friends and family described a young man who was outwardly capable but privately struggling — a context that became central to both the prosecution and the defense at trial.

Investigation

Because Roy's death initially looked like a straightforward suicide, the criminal investigation only intensified after police examined his phone and discovered the volume and content of his exchanges with Carter. Detectives obtained thousands of text messages, along with call logs and emails, that showed Carter moving from apparent support to active and repeated encouragement of suicide. As detailed in legal scholarship on Commonwealth v. Carter, prosecutors built their case almost entirely on this digital paper trail; there was no physical co-presence at the scene, and no traditional eyewitness.

The charging decision was itself controversial. Massachusetts has no specific statute criminalizing the encouragement of suicide, so prosecutors used the common-law theory of involuntary manslaughter, arguing that Carter's words constituted reckless conduct that proximately caused Roy's death.

Trial and Verdict

Carter waived her right to a jury, and the case was tried before Judge Lawrence Moniz of Bristol County Juvenile Court. On June 16, 2017, Judge Moniz found her guilty of involuntary manslaughter. He emphasized one moment in particular: when Roy left the truck during the carbon monoxide buildup, Carter — on the phone with him — told him to get back in. The judge ruled that this instruction, given to a person she knew to be in mortal danger, constituted the reckless act that caused his death.

Carter was sentenced to 2½ years in a house of correction, with 15 months to serve and the balance suspended. She served 11 months and 12 days before being released for good behavior. Her appeals argued that the conviction violated the First Amendment and that Massachusetts law gave no fair warning that text messages could constitute manslaughter. On February 6, 2019, the Massachusetts Supreme Judicial Court unanimously upheld the conviction, and the U.S. Supreme Court later declined to hear the case.

Today

The case is considered solved, with a final, affirmed conviction. It continues to be cited in debates over cyber-bullying, suicide encouragement laws, and the limits of free speech. Several states have considered or passed legislation specifically criminalizing coercion of suicide in response to the Roy case.

The story has been the subject of substantial media treatment, most notably the two-part HBO documentary _I Love You, Now Die: The Commonwealth v. Michelle Carter_, which presented the prosecution and defense narratives in parallel, and a video program titled _Death by Text_ examining the digital evidence. The case remains a touchstone in legal education for questions about causation, recklessness, and the criminal weight of words.