Zachary Chernicky, 31, was arraigned Tuesday on two counts of murder in the Tesla crash in San Jose that prosecutors say killed two people after the vehicle reached extremely high speeds. Chernicky was ordered held without bail and is scheduled to return to court on Aug. 25, according to the Santa Clara County District Attorney’s Office.
Arrest and arraignment in San Jose Tesla crash
Prosecutors allege Chernicky’s conduct led directly to the fatal collision that left two people dead. At arraignment, prosecutors told the court they are charging Chernicky with two counts of murder based on vehicle data they say ties excessive speed to the deadly outcome. The defendant was taken into custody in July following an investigation led by the California Highway Patrol in coordination with the Santa Clara County District Attorney’s Office.
What prosecutors say about the Tesla crash
Prosecutors say data recovered from the Tesla shows the car was traveling about 142 mph roughly 15 seconds before impact, about 126 mph approximately five seconds before impact, and around 102 mph at the moment it struck a Lexus that had stopped in traffic. Those specific speed readings — 142, 126 and 102 mph — figure prominently in the Santa Clara County District Attorney’s decision to file murder charges, which prosecutors say reflect the deadly risk posed by the alleged speeding.
Santa Clara County District Attorney spokespeople and prosecutors emphasized that their theory centers on the driver’s alleged speed rather than the vehicle make. DA officials quoted in reporting said the recovered data is central evidence the office will present in court; Deputy District Attorney Marisa McKeown has been quoted as saying, “The Tesla didn’t cause this crash. Chernicky did by driving over 140 miles per hour.”
Victims and crash scene details
The collision on Dec. 2, 2025, killed front-seat passenger Ivana Balistreri, 29, and her 1-year-old daughter, Lilliana. Local reporting and official statements indicated Lilliana was secured in a child safety seat in the rear of the Lexus. Authorities reported the Lexus burst into flames after the impact.
The California Highway Patrol said multiple vehicles were involved and that up to three vehicles caught fire in the chain-reaction crash. CHP also reported that the Tesla struck a separate Tesla and a Toyota during the incident. Those details about vehicle involvement and fires were provided by CHP as part of its ongoing investigation.
Evidence, investigation and CHP warning
The California Highway Patrol described Chernicky’s arrest as the result of a “comprehensive investigation” conducted with the Santa Clara County District Attorney’s Office. CHP and prosecutors say data extracted from the Tesla’s onboard systems helped investigators reconstruct the vehicle’s speed pattern in the seconds leading up to the collision.
CHP used public statements about the case to urge drivers to avoid excessive speed, warning that speeding endangers lives. In public comments tied to the investigation, CHP said, “Do not speed. Speeding costs lives. CHP will hold reckless drivers accountable.” Those are official agency remarks attributed to CHP in reporting about the probe.
Legal context and next steps
Chernicky faces two counts of murder, but those charges are allegations and do not constitute a conviction. Prosecutors have framed the case around the speed readings recovered from the vehicle; defense lawyers will have the opportunity to challenge the evidence and present counterarguments as the case proceeds through the courts.
At this stage, the defendant has been arraigned, ordered held without bail and is due back in court on Aug. 25. Public records and reporting indicate prosecutors have advanced a theory focused on high speed; the defense has not publicly filed a detailed response, and Fox News Digital reported it reached out to the Santa Clara County Public Defender’s office for comment.
Background on the defendant
Publicly available professional profiles identify Chernicky as the founder of CHURRDJ, a San Jose startup focused on software for Pioneer DJ equipment, and list prior technical-support roles at companies including Apple, Gong, Glean and Mistral AI. Fox News Digital reported contacting those companies and the public defender’s office for comment; the employment and business information cited comes from public profiles and has not been independently verified in court filings made available to date.
Ongoing investigation and what comes next
The Santa Clara County District Attorney’s Office and the California Highway Patrol said the investigation remains active as prosecutors prepare charges and evidence. Witnesses, vehicle data extraction and forensic reconstruction are part of the evidentiary process prosecutors indicated they will use to support their case in court. No conviction has been reported; the matter will continue through pretrial proceedings and evidentiary hearings prior to any trial.
This article is based on reporting from Fox News Digital. Source: Fox News — Silicon Valley developer accused of murder after investigators say Tesla reached 142 mph before fatal crash. Statements and facts in this story reflect allegations and official comments from the California Highway Patrol and the Santa Clara County District Attorney’s Office; allegations are not convictions. Investigators and prosecutors have urged motorists to avoid excessive speed to reduce the risk of tragic outcomes.
