UPDATE: Reinking has been taken into custody.

(CBS) — Travis Reinking is suspected of killing four people at a Tennessee Waffle House on Sunday.

Here are five things we know about him:

Reinking is 29 years old, from Morton, Ill., a town of about 17,000, 150 miles southwest of Chicago, near Peoria. He has been living near Nashville and was fired from his job at a crane company there.

Reinking  was known to authorities in Illinois.  For example, in 2016, police were called because Reinking believed singer Taylor Swift was hacking his phone and harassing him.

In July, 2017, Reinking was arrested outside the White House for trying to get in so he could meet with President Donald Trump.

Reinking had a valid firearms identification card, but it was revoked. Officials said his father acknowledged giving guns to his son after that.

One of those weapons, an AR-15, was used in the shooting, police said.