The woman said, "I was lucky he didn't kill me", explaining that they had "issues", and when he proposed to her, she turned him down. I will update as more information becomes available.
Police did not publicly name the gunman.
"It begs the damn question, What the hell is going on in the United States of America?"
"I can confirm with you that deputies did not exchange gunfire and right now we're going to preliminarily go with the assumption that it was a self-inflicted gunshot wound from the suspect", Santa Clara County Sheriff's Office spokesperson Russell Davis said during a briefing Wednesday.
Later on Wednesday, Biden ordered flags around the country to fly at half-staff. Santa Clara County Sheriff Laurie Smith said the victims worked together and were there in the morning together.
The victims, many of them longtime employees of the transit agency, were identified as Paul Delacruz Megia, 42; Taptejdeep Singh, 36; Adrian Balleza, 29; Jose Dejesus Hernandez, 35; Timothy Michael Romo, 49; Michael Joseph Rudometkin, 40; Abdolvahab Alaghmandan, 63, and Lars Kepler Lane, 63.
The shooting took place a little before 10 a.m.
The VTA shut down rail service at noon as the search by the bombers continued. It is considered the heart of Silicon Valley, a global center of technological innovation where some of America's biggest tech companies are based.
He confirmed in television news interviews that authorities had also responded to a fire at the home of the suspect that erupted at about the same time as the shooting.
It took firefighters about an hour to extinguish the two-alarm fire, which caused heavy damage and left the structure uninhabitable, the fire department said.
Agents with the US Federal Bureau of Investigation (FBI) are assisting with the investigation, and have declared there is a "sizable crime scene" to process.
An explosives-detecting robot sat in the street near the home while two bomb squad technicians entered the ranch-style house.
This year alone, the San Jose shooting is the 232nd mass shooting to occur in the USA, according to the Gun Violence Archive.
Wednesday's incident was the latest of at least nine deadly USA mass shootings in the past three months, including a string of attacks at Atlanta-area day spas in mid-March and a rampage days later that killed 10 at a Colorado supermarket. Earlier this month a man fatally shot his girlfriend and five other people before taking his own life at a birthday party in Colorado.