The unidentified assailant arrived at the company that makes accessories for recreational vehicles and campers at about 8am armed with a handgun and a knife, Demings said. A witness told deputies that he saw Neumann and the employee arguing but did not see a physical fight. Then, authorities said, he singled out others - shooting and killing five former colleagues, stopping at least once to reload. Demings said most of the victims were shot in the head and some were shot multiple times. He did not appear to belong to any type of subversive or terrorist organization, Orange County Sheriff Jerry Demings said. And he says he and his wife, Ann, are praying for the families who lost loved ones in the shooting reported about 8 a.m. Monday.
According to CNN, the victims were identified as 69-year-old Robert Snyder; 44-year-old Brenda Motanez-Crespo; 53-year-old Kevin Clark; 46-year-old Kevin Lawson; and 57-year-old Jeffrey Roberts.
The co-worker, who had no visible injuries, stated "he had problems in the past with John but thought they were resolved", the sheriff's office incident report said. "What this is at this point is likely a workplace violence incident".
That woman had been hired after Neumann was sacked in April, so he probably did not recognize her and knew she was not a former co-worker, Deming said.
Neumann, 45, was a veteran who was honorably discharged from the U.S. Army in 1999. The sheriff said Neumann did not have a concealed weapons permit. Neumann had been fired in April, and back in 2014, he'd been involved in a complaint that he battered an employee. When she came out, she saw someone on the floor.
"My boss is dead", the worker told her sister during a phonecall.
Local television station WFTV on Monday interviewed a woman they identified as Shelley Adams, who said her sister was in a washroom when she "heard a bang" in the office. He said he ran to the front door and found a woman pleading with a passerby to use a phone.
"It really all boils down pretty much to the same issues: A person wants to feel that they have more control, they want to have more power", said threat assessment expert Michael Corcoran. "Police got them across the street on this side".More news: Cristiano Sings 'Ronaldo, Ballon d'Or' During Real Madrid Celebrations
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The FBI is at the scene.
Authorities did not immediately comment on a possible motive for the shooting, which occurred just a week before the anniversary of the Pulse nightclub massacre in downtown Orlando.
Almost a year ago, a gunman claiming allegiance to the Islamic State militant group killed 49 people at the Pulse nightclub in Orlando, the deadliest mass shooting in modern U.S. history. The attacker at Pulse, who was killed by police after an hours-long standoff inside the club, had pledged allegiance to the Islamic State.
Two chaplains, paramedics and an Orange County Fire and Rescue truck arrived, along with two people carrying boxes of tissues.
The shooting happened inside a business that manufactures awnings. One hospital not far from the scene said it had received no patients from the shooting.
Florida Governor Rick Scott condemned the "senseless act of violence".
"I will remain in contact with the Orlando law enforcement community throughout the day as more information is made available", his statement said.
Law enforcement authorities in Florida say there are "multiple fatalities" following a shooting in an industrial area near Orlando.
The attack shows why people need to alert authorities whenever they learn of anything that could lead to violence, Banks said.