9 Investigates: Who is John Neumann Jr.?

ORANGE COUNTY, Fla. — 9 Investigates has been digging into the background of John Neumann Jr. since he was identified as the gunman who shot and killed five people Monday morning at Fiamma on Forsyth Road in Orange County.

Neumann was a veteran who was honorably discharged from the U.S. Army in 1999, investigative reporter Daralene Jones learned.

Law enforcement officials said he was a loner who was fired from Fiamma in April.

A search warrant has been issued for investigators to go into Neumann's home.

Court documents reveal a fellow Fiamma employee, who 9 Investigates is not identifying for his protection, attempted to file an injunction against Neumann for repeated violence and stalking.

The man told the Orange County judge that Neumann began “threatening his life… as well as his family, while getting physical, all while a supervisor was out to lunch.”

Three months later, the same employee told the judge, “Out of the blue Neumann attacks, ambushes him from behind some bushes while he calmly rode his bike home from work.” The man also said Neumann, “starts punching him violently in the back of the head… and attempts to strangle him during a struggle.”

The person who filed the injunctions was not one of Neumann’s victims.

A spokesperson for the Orange County Clerk of Courts told 9 Investigates that the man decided in May that he wanted to voluntarily dismiss the injunction for repeat violence and the court determined there weren't enough facts supporting the injunction for stalking.

Eyewitness News obtained mug shots dating back to 1995.

Neumann was charged with driving under the influence, habitual offender of driving on a suspended license, theft and resisting an officer without violence.

His last arrest was in 2010 for drug possession, leaving the scene of an accident and driving on a suspended license.

Don Pinson said he last spoke to his friend, Neumann, a couple days ago. They were texting about getting together Sunday and then Neumann canceled at the last minute.

"He was going to come over yesterday and gonna have to leave early cuz he had to get up early. I had no idea ... I thought he was job hunting. That's what he's been doing, you know. He's beend trying to find a job somewhere," Pinson said.

Pinson told Channel 9's Ken Tyndall that Neumann was a little quirky, but a regular, good guy that clearly needed help.