ATLANTA -- Georgia's Secretary of State has launched a full investigation and may seek criminal charges against three Georgia men who appear to have early-voted twice.

“This is extraordinarily disturbing," said Secretary of State Karen Handel.

A team of investigative journalists from WSB-TV in Atlanta, WFTV in Orlando and WFTS in Tampa and WCPO in Cincinnati compared Georgia's voter rolls with those in Florida and Ohio and found more than 100,000 people who appear to be registered to vote in more than one state, with no government oversight to catch it.

VIDEO: Some Georgians Suspected Of Voting Twice

WSB-TV Channel 2 tried to find Thomas Habel at the home where he's registered to vote in Hartwell, Georgia, but was unable to locate him.

That’s because he was spending time at his other home in Marco Island, Florida. Before he left for the Sunshine State, according Georgia's Secretary of State, Habel early-voted at the Hart County elections office.

Chief registrar Elizabeth Forbes says she knows Habel and saw him cast his ballot. She even gave him a sticker. State records confirm Habel voting on October 1, 2008, but Florida records show him voting there on October 25.

"Oh, then that's not good," said Forbes when she saw both voting records with Habel’s name on them.

Contacted at his Florida home Habel admitted voting in Florida at the Marco Island library, but says he doesn't recall voting in Georgia.

"Somebody would remember if they voted twice,” Habel insisted. “I went and got a ballot for my wife she called me and said she forgot to vote, she was down there and I went in there and I signed for it."

The registrar confirms Habel did that, too. His wife has already mailed in her Georgia absentee vote.

A check of Georgia's master voter rolls revealed more than 42,000 people who also appear to be registered in Florida. WSB-TV Channel 2 found three who appear to have double voted, which is a felony.

"Shocking, it's really shocking,” said voter Kelley Johnson. “I wouldn't think to do something like that."

But Johnson could vote in two states.

The college student has an absentee ballot from DeKalb County, even though she voted in Daytona Beach, Florida.

"Two days after I voted, my absentee ballot came in the mail,” explained Johnson. “I was just shocked, it had my little sticker, ‘I'm a Georgia voter’ on there."

WSB-TV Channel 2 found eight people who voted in Florida and received absentee ballots from Georgia. Another three voters who cast ballots in Ohio could have voted in Georgia.

"Because Ohio's a swing state, I'm not from here, I'm from Atlanta, so I re-registered in Ohio so we could possibly have a chance," admitted Lauren Arnone.

Arnone received her Cobb County ballot by mail, but vowed not to use it, even though she could.

"Something should be fixed about this because this can sway an election," said Arnone.

Georgia Secretary of State Handel agrees.

"Does our system just trust that people won't vote twice?” asked Handel. “From the federal level, yes pretty much."

There is no federal database to track voter registration and no laws obligating voters to notify their old state when they register in a new one.

“It's an extremely high potential for (voter fraud),” said Handel.

But she said right now the states have no capacity to compare their lists.

"You vote where you live,” said Handel. “You don't get to pick and choose based on what is a battleground state, so that's very disturbing and we will be looking at every single name on that list."

Her office will work together with Florida and Ohio to verify WSB-TV Channel 2’s data; a total of 112,000 people who might be double registered.

"It's very easy isn't it? You could potentially vote in, if we had worked it we could have voted in many places many times probably," said Aaron Bashore, who received two ballots.

People who simply got ballots in both places have not committed a crime, but Handel says voters like Tom Habel should beware.

"Anyone who votes twice is undermining the core of our democratic process that is serious and we will pursue this to the fullest extent," said Handel.

For the larger list of 112,000 voters, WSB-TV Channel 2 was only able to verify their first, middle and last name and dates of birth; some of them could turn out to be different people with the exact same information.

The Secretaries of State can match them by social security number and if they wait until after the election, they will have a complete list of how many of them voted and how many times.