A statement released later by the San Bruno police department identified her as Iran-born Nasim Najafi Aghdam, 39, from San Diego, California. The family later wrote a statement (see below) to KNX1070 offering condolences to the victims and expressing their shock over the situation.
Before the shooting, Aghdam had posted messages online claiming that her videos on YouTube were being censored.
The police officer said that the interview was of approximately 20 minutes and during that interval she didn't mention anything about her YouTube video or her video being suppressed by the channel or any indication of her unsafe plan.
"At no point during our roughly 20 minute interaction with her did she mention anything about YouTube, if she was upset with them, or that she had planned to harm herself or others", police said.
Some videos remained available on Facebook and on her personal website, however, where she complained that even her Farsi-language videos had been age-restricted by YouTube, accusing the company of trying to reduce her number of viewers.
They let her go, saying there was no indication she needed to be detained.
The Bureau of Alcohol, Tobaccao, Firearms and Explosives Wednesday conducted searches of multiple locations around the San Diego area associated with Aghdam, including homes where she'd previously lived as well as several vehicles, spokeswoman Ginger Colbrun told NPR.
Life in the United States had not been good, she said in one video from March 30. According to police officials, she identified herself and calmly told officers she was having problems with her family and looking for a job. When it unravelled, she got a gun and sought revenge in the world beyond the screen.
YouTube held a meeting for employees Wednesday morning, but the office was closed for the day.
A day before a woman opened fire at YouTube headquarters, her father said he warned police that his daughter was upset with the company's handling of her videos and might be planning to go to its offices, where she later wounded three people before killing herself. A fourth person was injured during the incident but wasn't shot. One victim remains in critical condition.
As for the victims of Aghdam's attack, Zuckerberg San Francisco General Hospital said two of the three patients the medical facility had received were discharged Tuesday night. The 27-year-old is listed in fair condition. It was not clear why police later said the people shot were not specifically targeted. In online postings, she criticized what she viewed as YouTube's censorship of her videos about veganism and fitness. "There is no equal growth opportunity on YOUTUBE or any other video sharing site, your channel will grow if they want (it) to!"
Nearly of all the alleged shooter's videos, which included content in English, Turkish, and Farsi, were removed by Tuesday evening.
As part of YouTube's policies, videos containing controversial material, profanity, or sexually suggestive content are at risk of being restricted and/or removed.
Check back with CrimeOnline as additional details become available.