Robinson said White's son, LeRoy White, 63, of Newport is "well known in the community." LeRoy White, a musician, lives about a mile away from the grocery store. Her attorneys said she was from Newport though public records show she at one time lived in the town of Middletown, about five miles away.
In Louise White's Facebook profile page, she lists Verizon Wireless under the "Employers" category.
Rhode Island Gov. Lincoln Chaffee was present for the historic win and praised her for waiting to claim her prize and getting professional help as well. "You were lucky and smart," Chaffee said.
The jackpot win is the first since the newly revamped $2 version of the Powernall game debuted Jan. 15, according to lottery officials.
While the chances of winning the lottery are slim, there are ways to increase your chances, says Richard Lustig, a seven time lottery winner in Florida who has earned more than $1 million.
In "Learn How to Increase Your Chances of Winning the Lottery," Lustig shares the strategy he calls "the winning lottery method."
"[Playing the lotto is] like any investment. You have to invest money to get something out of it," says Lustig, 59, a former singer and drummer from Florida.
"Most people buy a $1 ticket and win $10 and they put the $10 in their pocket," says Lustig. Those people are playing the game wrong. Instead, he says, if you win $10, then you should buy $11 worth of tickets because "if you lose, you only lost a $1."
The process earned him $98,000 after he played the Fantasy 5 game in Florida. The first prize he took home was in 1992, for $10,000.
"I use lottery money all the time to buy more tickets," Lustig said in 2010.
His biggest prize was more than $842,000 in 2002.
ABC News' Lyneka Little, Christina Ng, Candace Smith, and Jason Stine contributed to this report.