SEATTLE (AP) - When a lone gunman armed with a shotgun at a small Seattle university stopped firing at students to reload, another student pepper-sprayed him and subdued him with the help of others and prevented more deaths, police said."There are a number of heroes in this," Assistant Police Chief Paul McDonagh said. "The people around (the gunman) stepped up."A 19-year-old man was fatally shot and two other young people were wounded after the gunman entered the foyer at Otto Miller Hall on the Seattle Pacific University campus and started shooting Thursday afternoon. When he paused to reload, a student building monitor disarmed him. The gunman had additional rounds and a knife, McDonagh said."But for the great response by the people of Seattle Pacific, this incident might have been much more tragic," he said.The man in custody was not a student at the school, McDonagh told a news conference.Four people, including the young man who died, were taken to Harborview Medical Center. A critically wounded 19-year-old woman remained in intensive care Friday, according to the hospital. A 24-year-old man was in satisfactory condition. A 22-year-old man injured in the struggled with the suspect was treated and released, officials said.None of the victims was immediately identified.Aaron R. Ybarra, 26, was booked into the King County Jail late Thursday for investigation of homicide, according to police and the jail roster.Also late Thursday, police who said they were serving a warrant entered a house believed tied to Ybarra. A phone message left at that house in the north Seattle suburb of Mountlake Terrace was not immediately returned.Messages left with friends and relatives of Ybarra via social media were not immediately returned.The Seattle Times reported that the suspect's father, Ambrose Ybarra, said he did not know anything about the shooting."We just hope he's safe," he told the newspaper. "It's upsetting to have these accusations thrown around. We're in emergency mode. We are trying to stay calm."The paper said Zack McKinley described himself as one of Ybarra's closest friends and said he was "super happy and friendly."McKinley said the attack was puzzling because Ybarra was happy to have just started a job bagging groceries. Ybarra could get emotionally low, but McKinley said he had a good group of friends and never saw him depressed.Student Chris Howard was at Otto Miller Hall when the shooting happened. He said he saw the wounded woman on the floor. Her phone was covered in blood, but she asked those helping her to look through her phone for her mother, aunt and best friend."She was panicking," Howard said. "She said 'I think I'm going to die.'"To read more, visit our sister station, KOMO-TV, here.