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A Texas resident accused of attempting to firebomb the home of OpenAI CEO Sam Altman was detained without bail on Tuesday, with his attorney asserting that the defendant is suffering from a mental health crisis.
Daniel Moreno-Gama, 20, made a court appearance in San Francisco but refrained from entering a plea to several charges, including attempted murder. The judge allowed a postponement of his arraignment, scheduling his next court appearance for May 5.
Moreno-Gama’s public defender, Diamond Ward, vigorously challenged the prosecution’s case. She stated that Moreno-Gama is on the autism spectrum and was undergoing a “severe mental health crisis” during the time of the alleged incident.
“At most, this is a property crime,” Ward argued, suggesting that the prosecutors had overcharged her client. She implied that Sam Altman’s high-profile status might have influenced the gravity of the charges.
The accusations against Daniel Moreno-Gama, who allegedly targeted the OpenAI leader, were addressed in a San Francisco court. (KTVU)
Prosecutors say the attack was anything but minor.
Authorities allege Moreno-Gama traveled from Texas to San Francisco in a planned, targeted attempt to kill the OpenAI CEO. Early Friday morning, he allegedly hurled a Molotov cocktail at Altman’s home, setting an exterior gate on fire before fleeing on foot. No one was injured, and officials have not said whether Altman was home at the time.
Less than an hour later, investigators say Moreno-Gama showed up at OpenAI’s headquarters about three miles away, where he allegedly threatened to burn the building down and kill anyone inside. Surveillance video captured him throwing a chair at the glass doors, according to police.
The home of Sam Altman is seen from Chestnut Street in San Francisco on April 10, 2026. (Lea Suzuki/San Francisco Chronicle)
He was arrested outside the building, where authorities say he was carrying a jug of kerosene, a lighter and writings outlining his hostility toward artificial intelligence.
Sources familiar with the investigation previously told Fox News the suspect was carrying what they described as a manifesto — a multi-part document that included a list of AI executives and investors, along with their names and addresses.
“This was not spontaneous. This was planned, targeted and extremely serious,” FBI San Francisco Acting Special Agent in Charge Matt Cobo said.
Daniel Moreno-Gama appears in court as he faces attempted murder and arson charges in connection to the Sam Altman attack. (KTVU)
San Francisco District Attorney Brooke Jenkins has charged Moreno-Gama with two counts of attempted murder, alleging he targeted both Altman and a security guard at the residence, along with multiple arson-related offenses. She has said the charges carry potential penalties ranging from 19 years to life in prison.
Federal prosecutors have also filed charges, including possession of an unregistered firearm and destruction of property using explosives, which could add decades to any sentence if he is convicted.
“We are at the beginning of this investigation, but if the evidence shows that Mr. Moreno-Gama executed these attacks to change public policy or to coerce government or other officials, we will treat this as an act of domestic terrorism,” U.S. Attorney for the Northern District of California Craig Missakian said Monday.
Meanwhile, FBI agents raided Moreno-Gama’s home in Spring, Texas, on Monday, with Fox News on the ground as agents collected evidence for several hours.
Daniel Moreno-Gama stands in court with a deputy as he faces charges tied to the alleged attack on Sam Altman’s home and threats against OpenAI. (KTVU)
Officials say the suspect’s writings also included threats against other leaders in the artificial intelligence industry, raising broader concerns about escalating rhetoric surrounding the rapidly evolving technology.
Even groups that have warned about the risks of AI condemned the violence. The Future of Life Institute said intimidation has “no place” in the debate, while PauseAI said the suspect had no formal ties to the organization.
Prosecutors, however, are framing the case as a clear warning, urging cooler public discourse as tensions around artificial intelligence continue to rise.