Ricardo Cerezo of Geneva, Illinois, said his wife was cleaning out the kitchen and mentioned the lottery tickets that had accumulated over the past month in a glass cookie jar.
"It was either take them, get them checked, or she was going to trash them that night," Cerezo was quoted by the Chicago Tribune as saying.
Cerezo, a management consultant, said he took the tickets to a 7-Eleven in Aurora and scanned them. The first eight or nine tickets were not winners.
Cerezo went online and found that the numbers matched the February 2 Lotto drawing.
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"As each number kept matching, the smile kept going higher and higher. And when I realised we had all six numbers, it was that shocking moment of , 'Whoa, can this really be?'" he said in a news conference on Wednesday.
"Fast forward to the next day: Called in sick from work, went down into Chicago. It's one of feelings where it's okay if they fire me," Cerezo said.
Just three months earlier, Cerezo appeared at a foreclosure hearing where a judge gave him a few more months to find a new home before they would be evicted.
"That was on February 12, so we were sitting on USD 4 million at that time in this jar," he said. "We will have our home paid off."
Cerezo said February holds special significance for him and his family because his daughter Savannah was born in that month. She died from a sudden illness last year.