After a shooting at the Cascade mall in Burlington in Washington, which killed Five people – a teenage girl, three women and a man – inside Macy’s department store on Friday; Arcan Cetin was arrested in his hometown Oak Harbor on Saturday, nearly 24 hours after the attack, 40 minutes’ drive away.

Police said in court papers that all five victims were shot within a minute and the rifle was left on a cosmetics counter before the gunman fled.

At a news conference, police said Cetin had been identified as a suspect after a car connected to him was seen on security camera footage at the shopping centre.

Lt Mike Hawley, of Island County sheriff’s department, said the car was later spotted in Oak Harbor. He said he had been on his way to the scene when he saw the suspect by the side of a road and arrested him.

Lt Hawley said the man “said nothing, he was zombie-like” and was not carrying a weapon.

Who is Arcan Cetin

Arcan Cetin was born in Turkey and is a legal US permanent resident, officials say.

Investigators say they are not ruling out any motives, including terrorism.

Cetin’s stepfather says he has a history of mental health issues.

According to the Associated Press, Cetin’s postings online included references to a serial killer and Adolf Hitler, as well as pictures of so-called Islamic State’s leader, Abu Bakr al-Baghdadi, and the Iranian Supreme Leader Ayatollah Khomenei.

Court documents filed by prosecutors allege that Cetin confessed to shooting all five victims with a rifle.