New details emerged showing her final path: from San Diego, to Mountain View, to practice shooting a 9mm handgun at gun range hours before she wounded three people, then killed herself, at YouTube headquarters in San Bruno on Tuesday.
A 36-year-old man who was injured in the attack remains in a serious condition in hospital.
Aghdam was found asleep in a auto in a parking lot in Mountain View, California, about 30 miles away from San Bruno, where the shooting took place, police said. "At this time there is no evidence that the shooter knew the victims of this shooting or that individuals were specifically targeted", police said in a statement.
Aghdam's YouTube, Instagram, and website have been taken down following the attacks, but content uploaded in the last two weeks backs up her father's report that she was angry at the online video platform.
It was the culmination of a crackdown begun past year on controversial sites and in the immediate aftermath of scathing criticism following YouTube star Logan Paul publishing a video showing a dead body in a Japanese forest. State TV briefly reported the shooting based on global reports.
Nasim Aghdam, 39, bought the 9 mm Smith and Wesson pistol from a shop in San Diego on January 16 - about 11 weeks before she targeted the company, unleashing chaos as employees were eating lunch, San Bruno police Commander Geoff Caldwell told USA TODAY.
Aghdam also ran a Farsi-language public channel on the messaging app Telegram, which had 6,000 followers, featuring content unlikely to resonate with Iranians.
Hossein Naderi, a 23-year-old art student, questioned why Aghdam chose to "live in the USA though she didn't like it there".
KitGuru Says: Whether you agree or disagree with YouTube's censorship, I think it's unsafe to justify the frankly unstable actions of Aghdam as a by-product of the platform's actions. Nor did she give any indication she was a threat to herself, the news service said. "We called the cops again and told them there is a reason she went all the way from San Diego to there so she might do something".More news: VSS Unity conducts first powered flight
Upset family members said police did not heed their warnings that Nasim Aghdam was in the Bay Area likely because of her anger at the internet video-sharing giant.
At the well-manicured apartment complex in San Diego where Aghdam lived with her grandmother, neighbors described her eccentricities.
She collected her gun the same day YouTube Chief Product Officer Neal Mohan and Chief Business Officer Robert Kyncl announced in a blog post that the company was further tightening its rules and raising requirements for creators trying to make ad revenue off their videos.
"There seemed to be no kind of method or rhyme or reason to what she was doing".
The entire family was "very, very friendly", according to Rundell, who spoke most often with the father, an electrical contractor. "They said, 'Don't worry about, '" Ismail said. "If I had to pick neighbors, I'd have them all around".
She says Aghdam was entered into a national missing person's database.
"I am sorry. I can't believe it", he told reporters Wednesday. Barberini also said the 39-year-old got into the building through a parking garage, and that investigators are in the process of executing search warrants at two properties.
Hours before officers were called to YouTube's headquarters after being informed of an armed intruder, they had spotted the assailant parked in her auto and sleeping in a Walmart parking lot. The company did however issue a brief statement through a spokesman Wednesday afternoon, saying they would increase security at all offices worldwide for the long-term future.
The California Highway Patrol told Fox News that San Bruno police requested their assistance with the perimeter regarding reports of an active shooter.