A few minutes after that, the first body was brought out, he said. "They were just pulling out bodies after bodies."
He was deeply in debt and had tens of thousands of dollars in tax liens, including from the Internal Revenue Service, according to CNN affiliate KGO. Goh's brother, a staff sergeant in the Army, died last year in a car accident while training with the Special Forces, KGO said.
It wasn't immediately clear why Goh had been expelled from the college, Jordan said, but, "We've been told that some of the possibilities are that he was expelled for his behavioral problems, anger management, but nothing specific."
CNN affiliate KTVU reported Goh was an Oakland resident and a frequent visitor at Oakland's Westlake Christian Terrace senior housing, where his parents live.
"(He seemed) just like a really good kid, the kind of kid I want all my residents here to have," Audrey Williams of Westlake Christian Terrace told the station.
A woman who answered the phone Tuesday at Westlake Christian Terrace told CNN she knew nothing about the situation and hung up.
Police expect to present the case to the district attorney for possible charges in the next few days, Jordan said. Goh was being held Tuesday in Alameda County's Santa Rita Jail pending an initial appearance in court this week.
Asked why Goh stopped shooting, Jordan said authorities arrived within minutes of the first 911 call at 10:33 a.m., and investigators believe Goh did not want a confrontation with police.
Oakland Mayor Jean Quan said most of the victims appeared to be from the city's Korean-American community, and the city was working to find multilingual counselors to help survivors.
"No American mayor wants to have this situation," she said. "It seems over the last decade, we've gotten used to seeing senseless mass killings like this, and we'll have to question the availability of guns and the need for other services in our community."
A witness, Brian Snow, said he was at a nearby credit union when shots rang out.
"In Oakland, sometimes things like that happen, but it dies over," he said. But this time, he said, "I went outside and the cops were coming and like 'Don't move, don't move,' and it started getting chaotic. ... A pedestrian came out with a bullet hole, and I was like, 'Getting really crazy right now.' "
He said that after shots rang out, he called the credit union to tell them to lock their doors and also called the nearby restaurant where he works, but "all I could do was just lay on the ground and wait."
Lucas Garcia, who was teaching an English class at the college when the rampage began, told KGO that he counted about six gunshots from a nearby nursing classroom.
Garcia said he heard someone yell, "He's got a gun," and he got his students out of the building while the gunfire continued.
Several survivors, including the wounded, hid behind locked doors or desks as the shooting went on.
Tashi Wangzon said that when his wife, a student, heard the shots, she locked the door to her classroom and turned off the lights.
"The man with the gun later came toward the room and, at the time, he fired several rounds at the door," Wangzon told KGO. "Then he left (when he thought nobody was there)."
Lisa Resler said she encountered Goh as she went into a Safeway in Alameda to pick up groceries.
"He was by the front door," she told CNN. "There's a restroom that's right by the front door of the Safeway. We made eye contact with each other."
She said the man looked "a little bit distraught. He did look like he was a little bit sweaty and a little bit discombobulated."
When she came out of the store, the man was being arrested out front, she said. At the time, she said, she thought he had been caught shoplifting.
California Gov. Jerry Brown, who was Oakland's mayor from 1999 to 2007, called the killings "shocking and sad."
"Our thoughts and prayers go out to the victims, their families and friends and the entire community affected by this senseless act of violence," Brown said in a statement.
U.S. Education Secretary Arne Duncan said Tuesday he was "saddened" to learn of the "senseless violence and loss of life" at the college.
Tuesday evening, a grieving community will hold a memorial service for the victims at the Korean Methodist Church.
Officials said they may have to change the location if the church isn't large enough to hold all those who plan to attend.