The police in Nashville city in Tennessee state of the United States on Monday said they had arrested the gunman suspected of killing four people in a Waffle House restaurant on Sunday. “Murder suspect Travis Reinking is in custody. Arrested moments ago,” the Metropolitan Nashville Police Department tweeted.

The police said Reinking had been apprehended in a “wooded area” near Old Hickory Boulevard and Hobson Park. The police department added that it had searched the area with dogs and aerially on Sunday. On Monday, ground searches were conducted. The department said that Reinking had been sent to jail based on four murder warrants against him.

Don Aaron, a spokesperson for the department, said Reinking “showed signs of significant instability”, The Washington Post reported. “We are concerned for the citizens not just here but anywhere else he may go,” he added.

Aaron said that Reinking was arrested outside the White House last year, and had a series of “bizarre encounters” with the police in Illinois. Reinking once told law enforcement officers that singer Taylor Swift had been stalking him.

On Sunday, the suspect wore only a green jacket and was otherwise nude at the time of the shooting. He took off the jacket while fleeing the restaurant.

Reinking stole a BMW from a dealership in suburban Nashville just four days before the shooting, and eluded the police, Aaron said. The alleged shooter’s police history from 2016 reveals that despite running afoul of the law, he remained in possession of several firearms and a gun license in Illinois.

Though his gun licence was revoked and his firearms confiscated after he tried to cross a security barrier near the White House, the weapons somehow found their way back into his hands, The Washington Post said. Aaron said that after his Monday arrest, Reinking asked for a lawyer and refused to answer questions.