A San Mateo County sheriff’s sergeant and four deputies will not face criminal prosecution for killing an unarmed African-American man in Millbrae on Oct. 3.
District Attorney Steve Wagstaffe announced the findings of an investigation Friday into the death of 36-year-old Chinedu Okobi, nearly five months after the fatal encounter.
"It is a sad, tragic event," Wagstaffe said at a press conference.
Okobi’s family received the report on Thursday.
"This is an example of a person who is dead, who should not be, based upon the seemingly over-aggressiveness on the part of police officers," said the family's attorney, John Burris.
"Police initiated this conversation, the contact, used force, used their billy clubs, pepper spray and they used a Taser a number of times — all of which contributed to his death."
Okobi, a resident of Redwood City, was reportedly “running in and out of traffic” on a busy street around 1 p.m., according to an Oct. 3 press release from the San Mateo County Sheriff’s Office, when a deputy tried to make contact with him. The press release stated that Okobi “immediately assaulted the deputy,” who then called for backup. More law enforcement officers arrived as the struggle with Okobi continued. After Okobi was arrested, he was taken to the hospital where he was later declared dead.
The district attorney’s investigation determined that during the struggle, Deputy Joshua Wang fired his taser seven times and struck Okobi three times.
The forensic pathologist who conducted the autopsy, Thomas W. Rogers, said Okobi died of a heart attack and listed electrocution by Taser as a contributing factor. Rogers determined the death was a homicide.
The other officers involved in Okobi’s arrest are John DeMartini, Alyssa Lorenzatti, Bryan Watt and Sgt. David Weidner.
They are all back at work, according to Public Information Officer Rosemerry Blankswade.

Evidence Considered
San Mateo County sheriff's officers do not wear body cameras, but their vehicles are equipped with dashboard cameras. The district attorney's office collected that footage, along with cell phone video taken by witnesses and security camera footage from businesses. As part of the investigation, staff also interviewed the five officers who were involved in Okobi’s arrest and all of the civilian witnesses.
District Attorney Wagstaffe also consulted a use of force expert, John Martin, a former San Jose police sergeant and taser trainer. Martin concluded that Wang's attempt to detain Okobi and the firing of his taser "was consistent with that of a trained and reasonable officer facing similar circumstances."
"Okobi continued to struggle, including thrust kicking his leg at Deputy DeMartini, attempting to remove the probes, continuing to ignore commands and warnings, and returning to his feet. Mr. Okobi had clearly defeated and/or overpowered the deputies’ collective and individual efforts to use low- and intermediate-level force options," the report stated.
Controversy Over Video Footage
The district attorney's office posted the footage of Chinedu Okobi’s arrest on the county website.
Wagstaffe said that footage is the same as what Okobi’s family saw in November, but arranged in chronological order.
The family has said the video footage they saw contradicts the sheriff's office's account of what happened.




