ORLANDO, Fla. (AP) -- George Zimmerman had moved out of Florida recently, hoping for a fresh start.
In the two years since his acquittal in the fatal shooting of Trayvon Martin, the one-time neighborhood watch volunteer has had several run-ins with the law.
Once again, he is involved in a police investigation, only this time authorities say he was shot at in his pickup truck. What exactly transpired with the shooter - a man he crossed paths with last fall - is in dispute.
Zimmerman and Matthew Apperson were both driving Monday on a busy road in the Orlando suburb of Lake Mary when some sort of confrontation occurred. The passenger window of Zimmerman's pickup had a bullet hole in it and Zimmerman suffered minor injuries from flying glass and debris.
Zimmerman had returned to the area for Mother's Day and a doctor's appointment, and was driving to his doctor's office when the confrontation took place, said his attorney, Don West. Apperson works nearby, at a disability-benefits office.
George Zimmerman shooting 5/11 (Updated w/ shooter 5/19)
George Zimmerman's fresh start hampered by new investigation
FILE - This Jan. 10, 2015 booking file photo provided by the Seminole County Public Affairs shows George Zimmerman. The U.S. Justice Department said Tuesday, Feb. 24, 2015, that the former neighborhood watch volunteer will not face federal charges in the shooting death of unarmed 17-year-old Trayvon Martin. Zimmerman was acquitted in 2013 of second-degree murder. (AP Photo/Seminole County Public Affairs, File)
Matthew Apperson, 35, makes his first appearance in Seminole County court at the John E. Polk correctional facility in Sanford, Fla., on Saturday May 16, 2015. Apperson was charged Friday with aggravated assault with a deadly weapon, aggravated battery with a deadly weapon and firing a deadly missile into an occupied conveyance stemming from an incident involving George Zimmerman earlier in the week. (Joshua C. Cruey/Orlando Sentinel/TNS via Getty Images)
Matthew Apperson, who was involved in a shooting incident in Lake Mary, Fla., involving George Zimmerman, enters the Lake Mary Police Department just before his attorney Mark NeJame on May 11, 2015 in Lake Mary, Fla. The shooting was reported May 11, 2015 at Lake Mary Blvd. and Rhinehart Road. Zimmerman suffered minor facial injuries. Lake Mary Police Department Chief Steve Bracknell said the shooter in the incident today is believed to be Matthew Apperson of Winter Springs, a man Zimmerman had a road-rage incident with last year. (Red Huber/Orlando Sentinel/TNS via Getty Images)
Vehicle believed to belong to George #Zimmerman hauled from shooting scene #fox35 http://t.co/EtJduC9hiA
George Zimmerman was involved in another shooting today. Had traffic blocked. #orlando #thefloridalife
A witness says the alleged shooter who is a white male complied with Lake Mary police and was taken away.#wesh http://t.co/SSoLfyzJME
.@LakeMaryPD Chief Steve Bracknell said Zimmerman is being released from a hospital in Sanford now. Zimmerman did not shoot in the incident
I just saw Zimmerman get shot in the face on Lake Mary Blvd!!!! Sort of...
FILE - In this Tuesday, Nov. 19, 2013, file photo, George Zimmerman, acquitted in the high-profile killing of unarmed black teenager Trayvon Martin, listens in court, in Sanford, Fla., during his hearing on charges including aggravated assault stemming from a fight with his girlfriend. Prosecutors announced Wednesday, Dec. 11, 2013, that they will not file domestic violence charges against Zimmerman. (AP Photo/Orlando Sentinel, Joe Burbank, Pool, File)
George Zimmerman, acquitted in the high-profile killing of unarmed black teenager Trayvon Martin, arrives in court Tuesday, Nov. 19, 2013, in Sanford, Fla., for his hearing on charges including aggravated assault stemming from a fight with his girlfriend. (AP Photo/Orlando Sentinel, Joe Burbank, Pool)
FILE - In this July 9, 2013 file photo, George Zimmerman leaves the courtroom for a lunch break his trial in Seminole Circuit Court, in Sanford, Fla. A Seminole County Sheriff's Office statement says Zimmerman was arrested Monday, Nov. 18, 2013, after deputies responded to a disturbance call at a house in Apopka, Fla. Zimmerman will be transported and booked into jail. (AP Photo/Orlando Sentinel, Joe Burbank, Pool, File)
In this Monday, July 1, 2013 photo, George Zimmerman enters the Seminole County Courthouse, in Sanford, Fla., during his trial on second degree murder for the killing of Trayvon Martin. Whether they think he got away with murdering 17-year-old Trayvon Martin or that he was just a brave neighborhood watch volunteer âstanding his ground,â many Americans canât seem to get enough of George Zimmerman. And he canât seem to stop giving it to them. (AP Photo/Orlando Sentinel, Joe Burbank, Pool)
In this Saturday, July 13, 2013. photo, George Zimmerman, center, speaks with his legal counsel, Mark O'Mara, right, and Don West during Zimmerman's second degree murder trial for the killing of Trayvon Martin in Sanford, Fla. Whether they think he got away with murdering 17-year-old Trayvon Martin or that he was just a brave neighborhood watch volunteer âstanding his ground,â many Americans canât seem to get enough of George Zimmerman. And he canât seem to stop giving it to them. (AP Photo/Orlando Sentinel, Gary W. Green, Pool)
At left, American singer, songwriter, actor and social activist Harry Belafonte, Jr. listens as Dream Defenders Executive Director Phillip Agnew, right, raises his fist as he leads a chant calling for a special session Friday, July 26, 2013 in the Capitol in Tallahassee, Fla. Dream Defenders were joined by Belafonte, Jr. as they went into their 11th day of a sit-in of Florida Gov. Rick Scott's office. The sit-in is their response to the ânot guiltyâ verdict in the trial of George Zimmerman, the Florida neighborhood watch volunteer who fatally shot Trayvon Martin. They are continuing to demand Scott call a special session. (AP Photo/Phil Sears)
People walk in a community march for justice for Trayvon Martin, Monday, July 22, 2013 in Phoenix. Dozens of people participated in a protest march in Phoenix on Monday, calling for federal civil rights charges to be filed against Florida neighborhood watch activist George Zimmerman. A Florida jury acquitted Zimmerman in the shooting death of Trayvon Martin. (AP Photo/Matt York)
LOS ANGELES, CA - JULY 20: A woman holding a can of ice tea and bag of Skittles candy and hundreds of protesters take part in a 'Justice for Trayvon' vigil outside Los Angeles Federal Courthouse July 20, 2013 in Los Angeles, United States. The vigil, along with others held nationwide, was organized by the National Action Network and called for federal charges to be filed against George Zimmerman in the shooting death of teenager Trayvon Martin. (Photo by Kevork Djansezian/Getty Images)
People angry at the acquittal of George Zimmerman in the death of black teen Trayvon Martin protest outside City Hall in Los Angeles, California July 16, 2013. A jury in Sanford, Florida last week found Zimmerman, a volunteer neighborhood watchman, not guilty of shooting dead Martin, a 17 year-old unarmed teen on the night of February 26, 2012. AFP PHOTO / ROBYN BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)
George Zimmerman during a court hearing Thursday April 12, 2012, in Sanford, Fla. Zimmerman has been charged with second-degree murder in the shooting death of the 17-year-old Trayvon Martin. (AP Photo/Gary W. Green, Orlando Sentinel, Pool)
George Zimmerman, left, looks up at his attorney Mark O'Mara in the courtroom, Friday, April 20, 2012, during a bond hearing in Sanford, Fla. Circuit Judge Kenneth Lester says Zimmerman can be released on $150,000 bail as he awaits trial for the shooting death of Trayvon Martin. Zimmerman is charged with second-degree murder in the shooting of Martin. He claims self-defense. (AP Photo/Orlando Sentinel, Gary W. Green, Pool)
FILE - In this June 29, 2012 file photo, George Zimmerman, left, and attorney Don West appear before Circuit Judge Kenneth R. Lester, Jr. during a bond hearing at the Seminole County Criminal Justice Center in Sanford, Fla. Zimmerman called police multiple times to report black men he thought were suspicious in his neighborhood in the months before he fatally shot an African-American teen, but both his ex-fiance and the lead detective investigating Trayvon Martinâs death didnât regard the ex-neighborhood watch leader as racist, according to documents and recordings released Thursday, July 12, 2012 by prosecutors. (AP Photo/Orlando Sentinel, Joe Burbank, Pool, File)
George Zimmerman, defendant in the killing of Trayvon Martin, is seen in Seminole circuit court, in Sanford, Fla., for a pre-trial hearing, Tuesday, April 30, 2013. Zimmerman says he agrees with his attorneys' decision not to seek an immunity hearing under the state's "Stand Your Ground" self-defense law. (AP Photo/Orlando Sentinel, Joe Burbank, Pool)
Supporters wait for the arrival of Trayvon Martin's parents before a candlelight vigil in Union Square to commemorate the one-year anniversary of the fatal shooting of the Florida teenager by neighborhood watch member George Zimmerman in Florida, Tuesday, Feb. 26, 2013, in New York. (AP Photo/John Minchillo)
George Zimmerman returns to court after a recess in Seminole circuit court during his trial, in Sanford, Fla., Tuesday, June 11, 2013. Zimmerman has been charged with second-degree murder for the 2012 shooting death of Trayvon Martin.(AP Photo/Orlando Sentinel, Joe Burbank, Pool)
George Zimmerman sits Seminole circuit court on the third day of his trial, in Sanford, Fla., Wednesday, June 12, 2013. Zimmerman is accused in the fatal shooting of Trayvon Martin. (AP Photo/Orlando Sentinel, Joe Burbank, Pool)
George Zimmerman, right, answers questions from Judge Debra Nelson, with attorney Mark O'Mara, left, and jury consultant Robert Hirschhorn in Seminole circuit court during Zimmerman's trial in Sanford, Fla., Monday, June 17, 2013. Zimmerman has been charged with second-degree murder for the 2012 shooting death of Trayvon Martin.(AP Photo/Orlando Sentinel, Joe Burbank, Pool)
George Zimmerman smiles in response to a juror's answer during questioning in Seminole circuit court on the eighth day of his trial, in Sanford, Fla., Wednesday, June 19, 2013. Zimmerman has been charged with second-degree murder for the 2012 shooting death of Trayvon Martin.(AP Photo/Orlando Sentinel, Joe Burbank/Pool)
A transcript from George Zimmerman's police call on the night of the Trayvon Martin shooting is projected on a screen in Seminole circuit court furing George Zimmerman's trial, Monday, June 24, 2013 in Sanford, Fla. Zimmerman has been charged with second-degree murder for the 2012 shooting death of Trayvon Martin. (AP Photo/Orlando Sentinel, Joe Burbank,Pool)
State exhibit photos, including this of George Zimmerman on the night of the Trayvon Martin shooting, are projected on a video screen in court during the 15th day of Zimmerman's trial in Seminole circuit court, in Sanford, Fla., Friday, June 28, 2013. Zimmerman has been charged with second-degree murder for the 2012 shooting death of Trayvon Martin. (AP Photo/Orlando Sentinel, Joe Burbank, Pool)
A man who identified himself as Ike wears a shirt portraying George Zimmerman in cross-hairs across the street from the Trayvon Martin memorial in the historically black Goldsboro neighborhood of Sanford, Fla., Friday, July 12, 2013. Zimmerman has been charged with second-degree murder for the 2012 shooting death of Trayvon Martin.(AP Photo/Phelan M. Ebenhack)
FILE - In this July 20, 2014 file photo, Alvin Duplessis, 10, left, and Thomas McGriff, 5, foreground, hold signs with others from the Watson Memorial Teaching Ministries Church of New Orleans, at a rally in New Orleans held after the acquittal of George Zimmerman. The Rev. Al Sharpton's National Action Network organized "Justice for Trayvon" rallies nationwide to press for federal civil rights charges against Zimmerman, who was found not guilty in the shooting death of the unarmed black teenager, Trayvon Martin. (AP Photo/Gerald Herbert, File)
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Police recovered a handgun from Zimmerman and took two guns from Apperson's car. Both men had their guns legally.
"He never waved it, displayed it or brandished it," West said of Zimmerman. "He did not threaten Mr. Apperson in any way with a firearm."
Apperson's attorney, Mark NeJame, said the shooting was "a good, old-fashioned self-defense case."
"He is not looking for trouble. He did not want trouble," NeJame said of Apperson. "He's not following George Zimmerman around. He's not wanting anything to do with George Zimmerman, as it relates to any of this."
Police on Tuesday released a 911 call in which the caller says Apperson told him he was forced to fire at Zimmerman.
"A guy says he had to shoot a guy through the window and he wants the police to come," the man said on the call. "He had to shoot at somebody ... He said it was George Zimmerman."
Documents show detectives are investigating the shooting as a possible aggravated assault with a deadly weapon without intent to kill. There is no timetable on when they will decide on whether any charges are warranted.
Police appealed to the public for help, believing "there is someone that saw something" on the busy road, Lake Mary Officer Bianca Gillett said.
Zimmerman and Apperson were involved in a road-rage episode last September. Apperson said Zimmerman had threatened to kill him after Apperson made a U-turn that put him in an adjacent lane, asking "Do you know who I am?" Apperson decided not to pursue charges and police officers were unable to move forward without a license plate number or witnesses.
Two days later, Apperson called police to report that Zimmerman's truck was parked near the disability-benefits office. Zimmerman told police officers that he had an appointment in the same office park, and no charges were filed.
West refused to say where Zimmerman was now living. Zimmerman doesn't have a regular-paying job, and will stay in central Florida to cooperate with the investigation "until he is no longer needed," West said.
"He was getting settled," West said. "His plan was to be around for a couple of days and go back."
Zimmerman was acquitted in the February 2012 shooting death of Martin, an unarmed black teenager, in a case that sparked protests and a national debate about race relations. The Justice Department later decided not to bring a civil rights case against Zimmerman.
Since then, Zimmerman was charged with assault based on complaints from two girlfriends. In both cases, the girlfriends refused to cooperate and charges were dropped. His estranged wife also accused him of smashing her iPad during an argument days after she filed divorce papers. No charges were filed because of lack of evidence.