Mark Jamieson of the Seattle police said Thursday the 19-year-old suspect was identified using evidence left behind during the violent armed robbery spree, which rattled neighbors who live near the University of Washington campus.
Jamieson said a pair of officers spotted the man boarding a Metro bus in West Seattle on Monday at about 6 p.m. He was arrested without incident.
The suspect was then interviewed by detectives and later booked into the King County jail for investigation of an earlier assault that occurred in a University District tavern. More charges may be added, Jamieson said.
Although the arrest took place Monday, police did not disclose it until Thursday. The suspect's name was not immediately released.
Detectives are still searching for possible accomplices in the string of robberies, which happened early Saturday morning.
According to Seattle police, three armed robberies happened within 30 minutes and just a few blocks of each other. The victims - some of them believed to be drunk - were walking near the UW campus.
Neighbors said it makes no difference if some of the victims were intoxicated.
"I don't care how anybody would want to justify it," says one neighbor, Meagan Rothschild. "There's no justification for violence, period."