He said the 9mm Smith & Wesson handgun was legally purchased January 16 and registered in her name.
The day before the attack, the shooter's father, Ismail Aghdam, said he warned police that his daughter was upset with how YouTube handled her videos and might be planning to go to its offices.
"I looked down and saw blood drips on the floor and stairs".
"She was insane and just wanted to make herself famous", she said.
"It's as tragic as can be", he said of Tuesdays' shooting at YouTube headquarters in San Bruno.
He and his buddy, Daniel Sanford-Salar, would see Aghdam taping her own exercise videos on a patch of grass.
Investigators visited family homes in Southern California on Wednesday. They then telephoned her family, speaking to both her father and brother, to let them know that she was safe. He said he wasn't sure if his store - a long nondescript beige brick building next to an auto dealership, with palm trees surrounding the front entrance - had been contacted by law enforcement but said they would cooperate in any investigation.
- The family of Nasim Aghdam appear confused by the shooting rampage and are trying to come to terms with it. Now, remember, this happened in an open courtyard at YouTube's headquarters during lunch.
Police say so far the only connection they can find between her and YouTube is her anger that the service had recently changed how she was compensated for posting videos.
"My new videos hardly get views.so this is because I'm being filtered", Aghdam said in one video. They called her family to report that they had found her after.
Nasim Najafi Aghdam, right, takes part in an animal rights protest outside Camp Pendleton in 2009.
Authorities have said that Aghdam was angry about the YouTube's policies and practices and did not know the people she shot.
Zuckerberg San Francisco General Hospital said Wednesday that the third victim, a 36-year-old man, remains hospitalized in serious condition.
Originally built in the late 1990s for the clothing retailer Gap, the campus south of San Francisco is known for its sloped green roof of native grasses.
Just before 2 a.m. on Tuesday, officers patrolling the community of Mountain View, a suburban town that serves as the headquarters of search giant Google and software firm Symantec, spotted Aghdam's vehicle in a parking lot not far from a Whole Foods and 24 Hour Fitness. Three people were eventually wounded as a result of the incident. She offered few specifics about what she believed had been suppressed, other than to complain that her workout videos had been flagged as adults-only content.
"At the time I didn't know she had these extreme, quite frankly psychotic stances". The other two gunshot victims, a 32-year-old woman and a 27-year-old woman, were released after spending less than a day at the hospital.
"There is no equal growth opportunity on YOUTUBE or any other video sharing site, your channel will grow if they want to!", a post on a website linked to her Instagram said.