Patrick Lawrence Duignan, 45, described by police as a transient from Nevada, was detained by Seattle police after they contacted him Tuesday on an unrelated matter.
He was taken into custody without incident after a police crime database revealed a warrant issued in connection with the robbery of an electronics store Friday on West Overland Road.
Officers investigating the Friday morning robbery learned a man matching the subject's description had gone to a nearby convenience store shortly before the robbery. Officers were able to identify Duignan and obtained a $500,000 warrant for his arrest.
Boise detectives were notified Tuesday of Duignan's arrest. Since then, they have made contact with the suspect and have gathered further evidence linking him to the crime, according to a release from the Boise Police Department.
Duignan is being held without bail at the Seattle Correctional Facility, according to the King County Sheriff's Office. He will be returned to Idaho pending an extradition hearing.
Online records from Washoe County, Nev., show that Duignan has two criminal convictions from 2002 and 2009. The records from the Second Judicial District Court in Reno do not indicate the crimes he was charged with.
He does not have any previous arrests in Idaho, according to the state online crime repository.