32-year-old Megan Kelleher surrendered to police on Friday.
Investigators say she drained the funds of a 73-year-old woman she was supposed to be caring for.
Kelleher made 700 unauthorized transactions at a Drexel Hill bank since July of last year, police said.
In all, $120,000 was stolen.
Kelleher is expected to face charges of ID theft, fraud, and bank violations.
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