A shooting inside a SunTrust Bank in Sebring, Fla., on Wednesday left five dead. And while little is known about the motivation behind the shooting, a picture of the man accused of carrying out those murders began to emerge late last night.

Zephen Xaver, 21, opened fire inside the bank at about 12:30 p.m. Wednesday before calling 911 on himself, leading SWAT teams and hostage negotiators to descend on the bank as police feared hostages were trapped inside, according to the Highlands County Sheriff’s Office. A judge denied Xaver bond during his first appearance Thursday morning. Xavier was shackled and hung his head. He did not speak.

Meanwhile, two people who know Xaver — Alex Gerlach, a woman who says she dated him, and a friend of Gerlach’s — spoke publicly about the 21-year-old.

A ‘fascination with death’

Alex Gerlach, who said she dated Xaver on and off for about three years, said she met him in a psychiatric hospital in 2013 in Plymouth, Ind., the area where Xaver grew up and attended high school. Gerlach provided a photo of herself with Xaver to WSBT, a station in South Bend, Ind. (Xaver’s parents did not immediately return calls or messages from The Post to confirm whether he was diagnosed with a mental illness.)

“Since the time we met he had this fascination with death,” she said. “It got worse as we broke up. We got back together on and off for a while. Then I decided it was too much for my mental health.”

Still, she said they kept in touch every few months. She said last week he told her he had purchased a gun — a handgun, from what she remembers — but that “no one thought anything of it” because he had always liked guns, she said. A friend of Gerlach’s who also knew Xaver, and who spoke to The Post on the condition of anonymity, said Xaver had once told her he wanted to join the military “because he wanted to kill people."

On Tuesday at 11 p.m., the night before the shooting, the friend said Xaver sent her a Facebook message, which was provided to The Post. All the message said was “Hey..” Now, she said, she fears he was reaching out for help. Both friends say they had been encouraging him to seek help for years.

“I’m just sad that he didn’t get the help he needed because this could have been prevented,” the friend said.

“I’m even more upset that he messaged me and I didn’t say anything, because I didn’t want to speak to him out of respect for my best friend. Now I wish I would have. I feel like I could have said something if I would have known. But I know you never truly know what someone really has planned. I hope those poor people get the justice that he deserves.”

‘He wasn’t raised to be like this’

Josh Xaver, who identified himself as the suspect’s father, told CNN late Wednesday that his son moved to Florida about a year ago. He said he is “heartbroken for the victims.”

“He wasn’t raised to be like this,” he said. “He’s always been a good kid. He’s had his troubles, but he has never hurt anyone before.” CNN noted that he did not elaborate on what troubles he had faced.

While living in Sebring, Xaver had been hired in November as a correctional officer trainee at the Avon Park Correctional Institution, about 17 miles northeast of Sebring, the Florida Department of Corrections confirmed late Wednesday.

Xaver resigned from that job on Jan. 9, the department noted.

“He had no discipline while employed with the department,” Florida Corrections Department spokesman Patrick Manderfield said.

What happened inside the bank

At a news conference Wednesday, Sebring Police Chief Karl Hoglund and the Highlands County Sheriff’s Office detailed the scene and how they were able to take Xaver into custody.

When authorities arrived after receiving the 911 call, they established a perimeter and attempted to negotiate with the gunman from outside the bank, the sheriff’s office said.

“After negotiations to try to get the barricaded subject to exit the bank were not successful, the HCSO SWAT team entered the bank and continued the negotiations,” the sheriff’s office said.

Law enforcement officials take cover outside a SunTrust Bank branch in Sebring, Fla. (News Sun/AP)
Law enforcement officials take cover outside a SunTrust Bank branch in Sebring, Fla. (News Sun/AP)

The suspect, later identified as Xaver, eventually surrendered, authorities said. Xaver — wearing glasses, a light-colored shirt and cargo shorts — was handcuffed and led into the back of a police car after sundown Wednesday, according to video published by ABC Action News.

When police entered the bank, they discovered “at least five victims — people who were senselessly murdered as a result of [the gunman’s] act in this bank,” Hoglund said at the news conference.

Hoglund did not elaborate on whether others were wounded.

“Today’s been a tragic day in our community,” Hoglund said. “We’ve suffered significant loss at the hands of a senseless criminal doing a senseless crime.”

At the news conference, Hoglund said police had not finished identifying the victims or notifying their families.

He and other officials did not take questions or offer possible motives for the shooting.

Another mass shooting in Florida

The incident threw Sebring, a central Florida city about 80 miles south of Orlando, into a frenzy, closing part of U.S. Highway 29 for much of the afternoon. A nearby kindergarten and elementary school were temporarily placed on lockdown as well, WFLA News Channel 8 reported.

The Sebring shooting occurred just weeks before the first anniversary of the Parkland massacre, which saw 17 students and staff killed in a high school in February 2018. In January 2017, a traveler flew to the Fort Lauderdale, Fla., airport and then shot and killed five people in the baggage claim area.

In June of that same year, police said a disgruntled ex-employee returned to an Orlando factory after being fired and gunned down five former colleagues. A year earlier, a gunman who pledged allegiance to the Islamic State killed 49 people in Orlando’s Pulse nightclub.

Mass violence in public places frequently occurs after attackers have alarmed the people around them, research has shown. Many attackers made threats or suggested they harbored an intention for violence before the bloodshed occurred.

An FBI study examining dozens of active shootings between 2000 and 2013 found that more than half of the attackers had revealed their desire to carry out violence. Sometimes this was a threat to people they later targeted, but in other cases, it was a broader desire to hurt people.

The FBI research also found that in every active shooter’s life, at least someone noticed a concerning behavior; in many cases, people around the attacker saw multiple alarming behaviors. The study also found that despite the public view of mass violence as being linked to mental health, law enforcement officials could only verify about a quarter of the attackers had diagnosed mental health problems.

Mark Berman contributed to this report.

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