Terror Inspiration Eyed as Motive in OSU Attack

ISIS has released propaganda calling for similar attacks in recent weeks.
1:54 | 11/29/16

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Transcript for Terror Inspiration Eyed as Motive in OSU Attack
Investigators are now looking into the suspect's background and his posts online as they look now for a motive. ABC's chief investigative correspondent Brian Ross is here with more on that. Good morning, Brian. Reporter: Good morning, Amy. Authorities this morning say all signs point to ab attack inspired by terror propaganda carried out by a young man who until Monday seemed to be living the American dream. Abdul razak Ali artan, cum Laude. Reporter: It was five months ago that Abdul razak Ali artan graduated with honors before going on to Ohio state. So many people who are flipped by ISIS propaganda remotely look like they're leading successful lives. Reporter: But just minutes before the attack, law enforcement officials tell ABC news artan posted this message on Facebook. I can't take it anymore. America, stop interfering with other countries especially the Muslim ummah. If you want us muslims to stop carrying out lone wolf attacks, then make peace. It certainly looks like this individual had some sympathy for terrorist groups overseas. Reporter: Artan had only started at Ohio state this fall. He was recently profiled in the campus newspaper "The lantern" blaming the media for making muslims feel scared. His main concern was is it acceptable for me to pray on the oval before class? Reporter: Artan and his familyived near the campus where neighbors said there was nothing suspicious about him. Very astonishing. You don't know what people are up to now. Reporter: As police surrounded the apartment, family members left in tears. ISIS has been urging its followers to carry out attacks using a vehicle and over the holiday weekend they put out a new video showing how an attack with a knife can instill terror, even as ISIS loses territory in Iraq and Syria its propaganda continues to instill terror around the world. All right, Brian, thank you.

This transcript has been automatically generated and may not be 100% accurate.

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