Investigators search the San Diego home of YouTube shooter

SAN DIEGO -- Investigators Wednesday served a search warrant at the San Diego home of a woman who drove to the Northern California headquarters of YouTube, shot and wounded three people and then turned the gun on herself.

Nasim Najafi Aghdam, 37, was apparently upset with the online video company over policies that she thought targeted her channels, law enforcement officials confirmed at a news conference Wednesday.

San Bruno Police Chief Ed Barberini also revealed that Aghdam practiced at a gun range Tuesday morning before carrying out the shooting with a 9 mm Smith & Wesson handgun registered in her name.

Aghdam was a resident of Menifee, in Riverside County, before she came to San Diego to live with a relative at a 4S Ranch apartment complex on the 16000 block of Dove Canyon Road. Exactly when she made the move was unclear.

Police Wednesday morning said they'd obtained search warrants for two residences in Southern California, the 4S Ranch home and another in Riverside County.

Police say Aghdam opened fire as YouTube employees were taking their lunch breaks Tuesday. Authorities received numerous 911 calls reporting gunshots at the YouTube campus south of San Francisco at 12:46 p.m., according to the San Bruno Police Department.

Arriving officers encountered numerous employees fleeing the premises and one victim at the site, San Bruno Police Cmdr. Geoff Caldwell said. Two additional gunshot victims had fled to a neighboring business.

Inside the complex, officers located a dead woman -- later identified as Aghdam -- with an apparent self-inflicted gunshot wound, Caldwell said.

The most seriously injured victim, a 36-year-old man, remains hospitalized in critical condition, according to police. Two women, ages 32 and 27, were treated for less serious gunshot wounds and have since been released. Another woman injured an ankle while fleeing the scene.

On the day before the shooting, Aghdam's father had called police to report his daughter missing because she hadn't answered her phone for two days.

Police in Mountain View, south of San Bruno, found Aghdam sleeping in her car early Tuesday morning and notified the family.

When they heard where Agdam had been found, the shooter's family told police she might be going to YouTube because she "hated" the company, FOX 5 was told. Family members said Tuesday Aghdam was upset with YouTube for allegedly filtering her content to drive her views down.

Mountain View police issued a statement confirming the call:

"Aghdam's father stated that she may have been in the area because of this," according to the department. "He did not seem concerned that she was in the area, and wanted to simply let us know that may have been a reason for her move up here. Once again, at no point did her father or brother mention anything about potential acts of violence or a possibility of Aghdam lashing out as a result of her issues with her videos. They remained calm throughout this second phone call."

A website that apparently belonged to Agdham featured rants about perceived censorship by YouTube. Most of Aghdam's videos featured low production values and showed her dancing, singing and sharing pro-vegan and animal rights messages.

"Youtube filtered my channels to keep them from getting views!" she wrote on nasimesabz.com. "There is no equal growth opportunity on YOUTUBE or any other video sharing site, your channel will grow if they want [it] to!!!!!"

Aghdam, who apparently ran several social media sites in English, Farsi and Turkish, claimed that some of her videos were age-restricted in 2016 "after new close-minded YouTube employees got control of my Farsi YouTube channel ... and began filtering my videos to reduce views (and) suppress (and) discourage me from making videos!"

The YouTube campus remained closed Wednesday. The San Bruno police chief said Aghdam's car was impounded and being examined, but no notes or manifestos were found that forecast the violence, aside from online rants that did not appear to mention any violent intentions.