NASHVILLE (WDRB) -- Police say the suspect in the shooting that killed four at a Waffle House in Nashville had a gun in his backpack when they arrested him.

Metropolitan Nashville Police Department Lt. Carlos Lara said at a news conference Monday that 29-year-old Travis Reinking had a loaded semi-automatic gun, .45-caliber ammunition, a flashlight and a holster in the backpack.

Lara says construction workers told officers a person matching the suspect's description walked through the area and into woods. He says that when confronted, the suspect lay down on the ground and officers cuffed him.

Once cuffed, officers cut Reinking's backpack off of him and found the gun inside. A Colorado ID was found in his wallet, and that's how they identified him. 

Lt. Lara says Reinking was taken to the hospital to be checked out. He will then be taken to the jail and booked on four counts of criminal homicide. 

Nashville police posted on Twitter that Reinking was arrested at about 2 p.m. (eastern) in a wooded area near Old Hickory Boulevard and Hobson Park. Police posted two photos of the 29-year-old fugitive in the back of a cruiser. He was wearing a ripped shirt and dirty jeans.

A short time earlier, the department posted a picture of an empty laptop bag that was found in Nashville near the I-24 Old Hickory Boulevard interchange. Reinking's handwritten ID card was inside. It is unknown whether the bag was discarded before or after the shooting early Sunday morning.

Reinking was nearly naked and brandishing an assault-style rifle when he opened fire in the parking lot of an Antioch, Tennessee, Waffle House and then stormed the restaurant. Four people were killed, and four others were injured. A patron wrestled the gun away, and the gunman fled.

Metro Nashville Police spokesman Don Aaron told news reporters Monday that the 29-year-old stole a BMW from a dealership in nearby Brentwood last Tuesday. Police chased the car but opted to track the vehicle via a GPS device. It was recovered the same day at Reinking's apartment complex -- however, authorities did not know Reinking's identity at the time.

Police had warned the public that Reinking was armed and had "exhibited mental instability" in the past. 

A federal official says Reinking's father could face charges for returning guns that were taken from him after an incident last year at the White House.

Bureau of Alcohol, Tobacco, Firearms and Explosives Special Agent Marcus Watson said at a news conference that Jeffrey Reinking's act of returning the guns to his son is "potentially a violation of federal law."

Travis Reinking's right to own guns was revoked by Illinois authorities after he was charged with "unlawful entry" at the White House last July. He was demanding a meeting with President Donald Trump.

Illinois authorities returned the guns to Reinking's father, who lives in Illinois. Authorities say the younger Reinking moved to Nashville last fall.

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