Facebook executive says unreleased video calls into question police account of brother's death

Chinedu Okobi pictured with his family after his 2003 graduation.

(CNN)The sister of an unarmed black man who died after being tased by California deputies last month says police video of the incident contradicts official accounts of how he died.

Chinedu Okobi, 36, died on October 3 in Millbrae, a city about 30 miles northwest of Silicon Valley.
In a statement released that day, San Mateo County Sheriff's Office said deputies encountered Okobi "running in and out of traffic" about 1 p.m.
    Okobi "immediately assaulted" a deputy who got out of his vehicle and there was a struggle with other deputies who responded, the statement continued. It said Okobi was taken into custody and transported to a hospital, where he died. San Mateo County District Attorney Stephen Wagstaffe said Tasers were discharged at Okobi three to four times.
    An autopsy report has not been completed.
    Okobi's sister Ebele Okobi -- Facebook's public policy director for Africa -- said in a post on the social media platform Sunday that her family had seen videos on Friday of her brother "getting tortured to death in broad daylight."
    "They were shocking because they contradicted, in every single particular, the statement that the San Mateo County Sheriff's Office released and to which San Mateo District Attorney Steve Wagstaffe referred in multiple news outlets after my brother's murder," she wrote.
    CNN has not viewed the video and has not been able to confirm what it shows.
    Wagstaffe said the video will be released when an investigation into the incident has concluded.
    In a Monday statement, the San Mateo County Sheriff's Office said it "also wants these videos released to the public as soon as possible."
    "It is our understanding that there may still be witnesses to interview and therefore the release of video could influence the independent recollection of those witnesses," the sheriff's office said. "We need to provide the district attorney's office with every ability to conduct a full and complete investigation."

    'He is not fighting'

    Ebele Okobi wrote that the videos showed that her brother had been calmly walking on the sidewalk, carrying bags, when a deputy drove up alongside him and asked what he was doing, telling Okobi he needed to question him. Her brother then "walks to the intersection, looks out for traffic, and crosses the street," her Facebook post says.
    She said the deputy calls for backup and a second police car cuts off Okobi, who drops his bags and puts his hands in the air.
    "They grab him, rip off his jacket. He tries to run, asking, 'What's wrong? What did I do?'" Ebele Okobi wrote. She said her brother was then tased and fell to the ground while keeping his hands raised.
    "He is not fighting, just crying in pain. I will never forget the visual of his hands, waving above his head, open, begging. He begs them to take the Taser prongs off of him. He tries to pull them off himself," Ebele Okobi's post reads.
    "When there is a break in the torture, my brother staggers to his knees, tries to run away. A deputy pulls out his baton, strikes, they tase him again. My brother goes down. At some point, my brother tries to run across the street, they chase him, they tase him, they pepper spray him, they jump on top of him while he is prone," she writes.
    Eventually, the footage shows someone shouting "I see blood," she writes. "Then it's over." No CPR or other lifesaving measures are administered, she writes.

    Ongoing investigation

    Ebele Okobi listed a number of calls for action, including for the videos and relevant recordings to be released to the public. She also called for a moratorium on the use of Tasers in San Mateo County and the creation of a permanent independent police review body to investigate officer-involved killings and use of force.
    Wagstaffe declined her call for an independent investigation, saying his investigation is not yet complete.
    "Everything that I review at the end of this I release to the public," Wagstaffe said Sunday night.
    He told CNN that Okobi's family and