(CBS/AP) OAKLAND, Calif. - Police say One L. Goh, the former Oikos University student who is accused of killing seven in a school shooting, was upset about being teased over his poor English skills and went to the school Monday to find a female administrator.
Goh "went through the entire building systematically and randomly shooting victims," Oakland Police Chief Howard Jordan said at a news conference Tuesday. Goh forced a secretary into a classroom and asked people to line up, Jordan said.
"Not everyone was cooperative, and that's when he began shooting," he said. The dead included six students and the secretary, he said.
Jordan said Goh appeared to have planned the attack for several weeks.
Those connected to the school, including the founder and several students, said the gunman had studied nursing at the small Christian university. He was upset with administrators at the school, and also with several students.
"They disrespected him, laughed at him. They made fun of his lack of English speaking skills. It made him feel isolated compared to the other students," Jordan said.
The 43-year-old South Korean national had been expelled, possibly for behavioral problems, according to Jordan.
In his former home state of Virgina, Goh left behind a string of debts and minor traffic citations. He was also evicted from one apartment complex. His brother was killed in a car accident last year in Virginia while on active duty in the U.S. Army, according to Stars and Stripes newspaper.
After the shooting, Goh fled from the school in a Honda Accord that belonged to one of the victims, Jordan said. He was detained about an hour later at a Safeway supermarket about three miles from the university.
Police on Tuesday were still looking for the gun used, which Jordan described as a semiautomatic handgun.