Massachusetts authorities say the 17-year-old previously used the internet and AI chatbot for violent stories involving his family.
ACTON, Mass. — A 17-year-old Massachusetts boy charged with killing his mother and younger brother had recently used ChatGPT and the internet to explore violent fictional scenarios involving his family, according to prosecutors investigating the deaths.
Arjun Aravind faces two counts of murder in the deaths of his mother, Sudha Venkatesan, 45, and his brother, Siddharth Aravind, 14, who were found dead inside their Acton home Tuesday evening. Middlesex District Attorney Marian Ryan said investigators uncovered what she described as concerning online activity involving theoretical ideas and fantasy stories about Aravind’s family being killed. Authorities have not said that ChatGPT caused the alleged crimes or established the online activity as a motive.
Acton police were called to the family’s Martha Lane home shortly after 6:37 p.m. Aug. 11 after Aravind’s father requested a well-being check, according to the Middlesex District Attorney’s Office. Ryan said the father had been unable to reach family members after a tutor arrived for a scheduled appointment and could not get inside the home. The father had last seen his wife when he left for work at about 7 a.m., while Siddharth had been seen leaving a local recreation center around noon.
When officers entered the house, they found Siddharth dead on the first floor and Venkatesan dead in a finished basement area, authorities said. Ryan said both victims showed signs of trauma, but officials had not released an official cause of death as of Thursday morning. The Office of the Chief Medical Examiner was expected to determine how they died. Investigators also had not publicly identified what weapon or weapons, if any, were involved.
Arjun Aravind was not at the home when police arrived. Investigators said they determined that he had left in his mother’s 2014 green Honda Accord, leading authorities to issue an alert and search for him overnight. Early Wednesday, police in neighboring Wayland were responding to an unrelated business alarm when they spotted the Honda in a parking lot on Andrew Avenue. Officers found Aravind inside the car and took him into custody without incident, Ryan said.
As investigators examined events before the deaths, authorities said they learned Aravind had recently displayed behavior that raised concerns. Ryan said the investigation found that he had used both the internet and ChatGPT for searches involving theoretical ideas or fantasies about killing his family. During a news conference, Ryan said some of his interactions with ChatGPT involved creating characters and what she described as Gothic-style fictional stories that appeared to involve threats to his family’s survival.
Authorities have not publicly released the ChatGPT conversations or a complete account of the searches, and it remains unclear what responses the chatbot gave Aravind. Prosecutors also have not said that the AI system provided instructions for violence. The distinction is significant because the evidence publicly described so far establishes alleged use of ChatGPT for violent fictional material but does not establish that the chatbot encouraged, planned or facilitated the deaths.
OpenAI, the company behind ChatGPT, has said separately that its systems are designed to recognize signs of potential harm to others and respond with greater caution when concerning context develops during conversations. In May, the company said it had updated ChatGPT to better recognize risk across interactions and to refuse harmful details, de-escalate concerning exchanges or redirect users toward safer alternatives. OpenAI also says accounts identified as belonging to users under 18 receive additional safeguards around areas including graphic violence and other high-risk material.
The charges against Aravind include two counts of murder, two counts of assault and battery on a family or household member, two counts of assault and battery, use of a vehicle without authority and theft of a motor vehicle, according to the district attorney’s office. He was arraigned Wednesday in Lowell Juvenile Court on charges involving the vehicle. Ryan said Massachusetts juvenile court does not have jurisdiction over the murder charges, requiring those allegations to proceed separately in district court.
Acton Police Chief Douglas Sturniolo said authorities had previously encountered Aravind after he ran away during the prior year. Officials have not announced a motive for the deaths, and no public information reviewed Thursday established whether his earlier behavior was connected to what happened inside the Martha Lane home. Investigators were continuing to examine the circumstances and evidence surrounding the deaths.
Aravind was scheduled to appear Thursday in Concord District Court on the murder and assault-related charges. As of the latest reports reviewed Thursday morning, the medical examiner’s findings had not been publicly released and the investigation remained active. The criminal allegations against Aravind have not been proven in court.