Authorities are searching for a 29-year-old man accused of opening fire on a Waffle House in Antioch, killing four people and injuring four others.

Police say Travis Reinking carried out the mass shooting at the restaurant on Murfreesboro Pike at 3:19 a.m. Sunday with an AR-15 rifle. He was wearing nothing but a green jacket at the time.

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Reinking was arrested on Monday by Metro Police in a wooded area not far from the Waffle House. He is being held on $2 million bond.

Reinking, who is from Illinois, moved to Nashville in the fall of last year and worked in the crane and construction business.

According to police, he was fired from a job three weeks ago. News 4 learned that he was then hired by Crane Works in La Vergne last Monday, but only worked there one day. The company says he did not have a sensitive position and did not display any signs of mental instability.

On Sunday afternoon, law enforcement in Tazewell County, Illinois, held a press conference explaining their history with Reinking and his family.

They said there were concerns in the past about his mental health. In May 2016, he told Illinois police he thought Taylor Swift was stalking him and hacking into his phone. He also appeared to be suicidal at one time, according to a police report.

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His behavior also drew attention in 2017. Reinking reportedly wore a pink dress to work while carrying an AR-15 and started yelling at someone. He also told police last year that 30 to 40 people were trying to hack into his phone.

On Aug. 24, 2017, officials confiscated four weapons from Reinking due to worries about his mental stability. He voluntarily surrendered the weapons to police, who then turned them over to his father Jeffery Reinking, after he promised to keep them secured and away from his son.

Local officials say Reinking’s father has admitted to returning the weapons to his son, one of which was the AR-15 reportedly used in Sunday's shooting.

It will be up to the Illinois state attorney to decide if charges will be filed against Jeffery Reinking for returning confiscated weapons, but none have been filed at this time.

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INTERACTIVE MAP: Key locations in the investigation

FULL VIDEO: Police give updates in Waffle House shooting

VIDEO: Eyewitness describes scene of deadly shooting

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VIDEO: News4 interview with the hero who stopped the shooting

Reinking's run-in with the law also includes an incident from July 2017. He was arrested by the U.S. Secret Service for being in a restricted area near the White House but was later released. He was interviewed by authorities in Illinois and the FBI, which is when his Illinois firearms authorization was revoked.

Reinking was placed on the TBI's Top 10 Most Wanted List for his alleged role in the Waffle House shooting. More than 80 MNPD officers along with the THP, FBI, and the ATF were searching for him Sunday night.

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