Ambridge police charged 24-year-old Karri Kathleen Villella with burglary, theft and other charges on Monday for allegedly stealing jewelry that belonged to the man's late wife.
Investigators say Villella admitted taking two rings the man noticed missing and taking a house key she used to return and steal more items.
Authorities say the victim thought Villella was bringing him food because he was a regular customer at the restaurant where she worked and often sat in her section.
Villella is being held on $10,000 bail. Court records don't list an attorney for her.
