The hacker did take out a credit card through Target, and we also have two email addresses this person is using. I know it's not much information, but is there anything we can do? Or is this just one of those cases where we just have to shrug off and say life sucks sometimes?
Uh, no. Unless you enjoy someone snooping your mom's correspondences and social media accounts.
Otherwise, cancel the credit card and act fast to take back her accounts. Get her a password manager and help create strong and secure passwords for the accounts.